More Related Content More from Nittaya Noinan (20) แบบฝึกหัดจำนวนจริงเพิ่มเติม1. Practices Extra Mathematics
Code ค 31201
System of Real number
Semester 1 , 2013
Kanchanapisekwittayalai Phetchabun School
Name and
Surname.........................................................
.............
Number......................M. 4/
……………………..
Kanchanapisekwittayalai
Phetchabun School
The Secondary Education
Service Area Office 40
3. ............. 2) 1.02020.... เป็นจำำนวนตรรกยะ
............. 3) -3.9999.... เป็นจำำนวนเต็ม
............. 4) 1+ 3 เป็นจำำนวนตรรกยะ
............. 5) 4− เป็นจำำนวนอตรรกยะ
............. 6) 2.5·4· เป็นจำำนวนตรรกยะ
............. 7) 5.9 เป็นจำำนวนคู่
............. 8) มีจำำนวนเต็มที่มำกที่สุดที่น้อยกว่ำ – 1
............. 9) มีจำำนวนจริง x ที่ 21 −=+x
.............10) baba +=+ 2
)( เมื่อ a , b เป็น
จำำนวนจริง
แบบฝึกที่ 2
ชื่อ........................................................................................
....ชั้น..........................เลขที่...........
Consider the following operation of sets and write
in front of the correct properties.
เซต สมบัติปิดสำำหรับ
กำร
บวก
กำร
ลบ
กำร
คูณ
กำรหำรที่ตัวหำร
ไม่เป็น 0
เซตของจำำนวนคู่
เซตของจำำนวนเต็ม
ลบ
เซตของจำำนวนคี่
บวก
เซตของจำำนวนเต็ม
เซตของ
จำำนวนตรรกยะ
เซตของ
จำำนวนอตรรกยะ
เซตของจำำนวนที่ 3
หำรลงตัว
{-1 , 1}
{-10 , -5 , 0 , 5 ,
10}
4. {0 , 1 , 2 , 3 ,
4 , 5 , …}
Write the operation of properties of real
number.
1) (1 + 2)×3 = 3×(1 + 2) สมบัติ
.................................................
2) (2×3) + 0 = 2×3 สมบัติ
................................................
3) 033 =− สมบัติ
.................................................
4) R∈+π2 สมบัติ
.................................................
5) 15
5
1
=× สมบัติ
.................................................
6) R∈63 สมบัติ
.................................................
7) 5×(3 + 4) = 5×(4 + 3) สมบัติ
.................................................
8) 520)
2
1
2(10 += สมบัติ
.................................................
9) ππ =+ )( ba สมบัติ
.................................................
10) 45×99 = 45×(100 – 1) สมบัติ
.................................................
= 4500 – 45
= 4455
แบบฝึกที่ 3
ชื่อ........................................................................................
....ชั้น..........................เลขที่...........
Answer the following the questions.
Give A = {-2 , -1 , 0 ,1 ,2}
5. 1) A มีเอกลักษณ์สำำหรับกำรบวกหรือไม่. ..............
ถ้ำมีคือจำำนวนใด ...............
2) A มีเอกลักษณ์สำำหรับกำรคูณหรือไม่. ..............
ถ้ำมีคือจำำนวนใด ...............
3) สมำชิกทุกตัวของ A มีอินเวอร์สสำำหรับกำรบวกหรือ
ไม่. .................
3.1 อินเวอร์สสำำหรับกำรบวกของ - 2 คือจำำนวนใด
.................
3.2 อินเวอร์สสำำหรับกำรบวกของ - 1 คือจำำนวนใด
.................
3.3 อินเวอร์สสำำหรับกำรบวกของ 0 คือจำำนวนใด
................
3.4 อินเวอร์สสำำหรับกำรบวกของ 1 คือจำำนวนใด
................
3.5 อินเวอร์สสำำหรับกำรบวกของ 2 คือจำำนวนใด
................
4) สมำชิกทุกตัวของ A มีอินเวอร์สสำำหรับกำรคูณหรือไม่.
..................
4.1 อินเวอร์สสำำหรับกำรคูณของ - 2 คือจำำนวนใด
..................
4.2 อินเวอร์สสำำหรับกำรคูณของ - 1 คือจำำนวนใด
..................
4.3 อินเวอร์สสำำหรับกำรคูณของ 0 คือจำำนวนใด
..................
4.4 อินเวอร์สสำำหรับกำรคูณของ 1 คือจำำนวนใด
..................
4.5 อินเวอร์สสำำหรับกำรคูณของ 2 คือจำำนวนใด
..................
Fine the Inverse of Addition and Multiplication of
real number.
1) 5
2
− อินเวอร์สสำำหรับกำรบวก คือ
......................
อินเวอร์สสำำหรับกำรคูณ คือ .......................
2) 3
1
อินเวอร์สสำำหรับกำรบวก คือ .....................
อินเวอร์สสำำหรับกำรคูณ คือ ......................
3) 32 + อินเวอร์สสำำหรับกำรบวก คือ ....................
6. อินเวอร์สสำำหรับกำรคูณ คือ ......................
4) 53
2
−
อินเวอร์สสำำหรับกำรบวก คือ ....................
อินเวอร์สสำำหรับกำรคูณ คือ .....................
แบบฝึกที่ 4
ชื่อ........................................................................................
....ชั้น..........................เลขที่...........
คำำสั่ง ให้นักเรียนแยกตัวประกอบของพหุนำมต่อไป
นี้โดยวิธีกำรดึงตัวร่วม.
1. x2
-25x
………………………………………
…………………
2. x3
-4x2 ………………………………………
…………………..
3. x4
-4x
………………………………………
………………….
4.
15x2
-
25x
………………………………………
…………………..
5. 81x2
-x
………………………………………
………………….
6. 7x2
+49
………………………………………
………………….
7.
88x3
+8
x2
………………………………………
………………….
8.
13x4
+x
2
………………………………………
…………………
9.
5x3
+15
x2
………………………………………
……………………
1
0.
100x4
+
10x3
………………………………………
…………………..
8. 4) x2
– 6x - 16 =
……………………………………………………..
5) x2
+ 5x - 24 =
……………………………………………………..
6) x2
+ x - 30 =
……………………………………………………..
7) x2
– 14x + 48 =
……………………………………………………..
8) 21 – 10x + x2
=
……………………………………………………..
9) 2 + x - x2
=
……………………………………………………..
10) 2x2
+ 7x + 3 =
……………………………………………………..
11) 3x2
- 7x + 2 =
……………………………………………………..
12) 5x2
+ 13x + 6 =
……………………………………………………..
13) 7x2
+ 3x -4 =
……………………………………………………..
14) 9x2
- x - 4 =
……………………………………………………..
15) 4x2
+ 8x + 3 =
……………………………………………………..
16) 4x2
+ 16x + 15 =
……………………………………………………..
17) x2
– 9 =
……………………………………………………..
18) 25 – x2
=
……………………………………………………..
19) 9x2
– 16 =
……………………………………………………..
20) 36x2
– 25y2
=
……………………………………………………..
10. …………………………………………………………………………..
……………………………………………………………………………
5) x2
+ 8x + 6 =
……………………………………………………..
…………………………………………………………………………..
…………………………………………………………………………..
……………………………………………………………………………
แบบฝึกที่ 7
ชื่อ........................................................................................
....ชั้น..........................เลขที่...........
คำำสั่ง ให้นักเรียนแยกตัวประกอบของพหุนำมต่อไปนี้โดยใช้
วิธีกำำลังสองสมบูรณ์.
6) x2
+ 10x + 3 =
……………………………………………………..
…………………………………………………………………………..
…………………………………………………………………………..
11. ……………………………………………………………………………
7) x2
– 8x - 1 =
……………………………………………………..
…………………………………………………………………………..
…………………………………………………………………………..
……………………………………………………………………………
8) x2
– 4x – 2 =
……………………………………………………..
…………………………………………………………………………..
…………………………………………………………………………..
……………………………………………………………………………
9) x2
– 6x + 4 =
……………………………………………………..
…………………………………………………………………………..
…………………………………………………………………………..
……………………………………………………………………………
10) x2
- 10x - 2 =
……………………………………………………..
…………………………………………………………………………..
…………………………………………………………………………..
……………………………………………………………………………
12. แบบฝึกที่ 8
ชื่อ........................................................................................
....ชั้น..........................เลขที่...........
คำำสั่ง Find the answer of the following
equation.
1) x2
-25x =
0 .........................................
...........................................................................
.
...........................................................
..........................................................
...........................................................
..........................................................
...........................................................
..........................................................
...........................................................
..........................................................
...........................................................
..........................................................
...........................................................
..........................................................
2) 36x2
– 6x = 0
............................................................................
......................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
13. ......................................................................
...............................................
3) x2
– 17x + 60 = 0
...........................................................
..........................................................
...........................................................
..........................................................
...........................................................
..........................................................
...........................................................
..........................................................
...........................................................
..........................................................
...........................................................
..........................................................
...........................................................
..........................................................
4) x2
– 3x – 27 = 0
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
14. 5) 3x2
+ 7x + 2 = 0
...........................................................
..........................................................
...........................................................
..........................................................
...........................................................
..........................................................
...........................................................
..........................................................
...........................................................
..........................................................
...........................................................
..........................................................
...........................................................
..........................................................
...........................................................
..........................................................
6) 9x2
- 33x + 30 = 0
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
15. 7) x2
+ 10x + 3 = 0
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
8) x2
- 8x + 15 = 0
...........................................................
..........................................................
...........................................................
..........................................................
...........................................................
..........................................................
...........................................................
..........................................................
...........................................................
..........................................................
...........................................................
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...........................................................
..........................................................
...........................................................
..........................................................
16. 9) x2
+ 5x + 1 = 0
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
......................................................................
...............................................
แบบฝึกที่ 9
ชื่อ........................................................................................
....ชั้น..........................เลขที่...........
คำำสั่ง ให้นักเรียนแยกตัวประกอบของพหุนำมต่อไปนี้โดยใช้
สูตร.
1) x2
- 4x - 21 = 0
…………………………………………………………………………..
…………………………………………………………………………..
……………………………………………………………………………
17. 2) x2
= 4x
…………………………………………………………………………..
…………………………………………………………………………..
……………………………………………………………………………
3) x2
– 2x = 6
…………………………………………………………………………..
…………………………………………………………………………..
……………………………………………………………………………
4) 3x2
+ 2x - 3 = 0
…………………………………………………………………………..
…………………………………………………………………………..
……………………………………………………………………………
5) 2x2
+ 4x = 1
…………………………………………………………………………..
…………………………………………………………………………..
……………………………………………………………………………
แบบฝึกที่ 10
ชื่อ........................................................................................
....ชั้น..........................เลขที่...........
18.
Write the following interval be in set and graph
it .
1) (-2 , 3) = …………………………
2) [-3 , 1] = …………………………
3) [2 , 9] = …………………………
4) (5 ,α ) = …………………………
5) (-α ,2] = …………………………
6) (-4 , 0] = …………………………
7) [-10 , -5] = …………………………
8) (-1 , 7] = …………………………
9) [-5 ,α ) = …………………………
10)(-α ,10) = …………………………
Give A = (-3 , 5) , B = [-1 , 8] and C = [0 , α )
Find the sets of the following question.
1) A∪ B = …………………………………………………….
2) A∩ B = …………………………………………………….
3) B – C = …………………………………………………….
4) A′∩ C = ……………………………………………………
5) (A∪ C)∩ B = ………………………………………………
Write in front of the correct sentence and
write in front of the incorrect sentence.
.......... 1) { -2 , 5 } ⊂ [ -2 , 5 ]
.......... 2) ( -2 , 5 ) ⊂ [ -2 , 5 ]
19. .......... 3) ( a , b ) ∩ { a , b } = φ
.......... 4) ( a , b ) ∪ { a , b } = [ a , b ]
.......... 5) ( a , b ) ∩ [ a , b ] = ( a , b )
.......... 6) a ∈ { a , b }
.......... 7) a ∈ ( a , b )
.......... 8) 3 ∈ [ 1 , 5 ]
.......... 9) 3 ∈ ( -3 , 3 )
..........10) [ 2 , 6 ] ⊂ ( 0 , 10 )
..........11) ( -3 , 2 ] ∩ ( -1 , 4 ] = [ -1 , 2 ]
..........12) ( -3 , 2 ] ∪ ( -1 , 4 ] = ( -3 , 4 ]
..........13) ( -α , 5 ] ∪ ( 5 ,α ) = R
..........14) ( -α , 5 ] ∩ ( 5 ,α ) = φ
..........15) ( -5 , 3 ] – [ -1 , 7 ) = ( -5 , -1 )
Give U = [ -5 , 5 ] , A = { x / -2 < x ≤ 1 } , B
= { x / 0≤ x < 4 } and
C = { x / x < 2 } Find the answer be in set , write
the graph and write the answer be interval.
1) A ∪ B = ………………………….
2) A ∩ B = ………………………….
3) A – B = ...........................................
4) B ∩ C′= ...........................................
5) A′∪ C = ...........................................
แบบฝึกที่ 11
ชื่อ........................................................................................
....ชั้น..........................เลขที่...........
20. คำำสั่ง Find the answer of inequalities and
show in graph.
1) 4x + 2 > x + 7
…………………………………………………………………………..
…………………………………………………………………………..
……………………………………………………………………………
2) 2x – 1 < x + 9
…………………………………………………………………………..
…………………………………………………………………………..
……………………………………………………………………………
3) 8x – 5 ≥ 3x + 15
…………………………………………………………………………..
…………………………………………………………………………..
……………………………………………………………………………
4) 3x -2 ≤ x
…………………………………………………………………………..
…………………………………………………………………………..
……………………………………………………………………………
5) 4(m – 3 ) ≤ -3(m + 2)
…………………………………………………………………………..
…………………………………………………………………………..
……………………………………………………………………………
22. คำำตอบคือ ............................
ดังนั้น เซตคำำตอบของอสมกำรนี้คือ ................. ∪ .................
= ………………………
3) Find the answer of inequalities of x2
– 5x – 6 ≥ 0
วิธีทำำ จำก x2
– 5x – 6 ≥ 0
จะได้ (………)(……..) ≥ 0
กรณีที่ 1 ......................... และ ......................
……………….. และ ............……..
คำำตอบคือ ............................
กรณีที่ 2 ......................... และ ......................
……………….. และ ............……..
คำำตอบคือ ............................
ดังนั้น เซตคำำตอบของอสมกำรนี้คือ ................. ∪ .................
= ………………………
4) Find the answer of inequalities of 2x2
+ 9x + 4 < 0
วิธีทำำ จำก 2x2
+ 9x + 4 < 0
จะได้ (………)(……..) < 0
กรณีที่ 1 ......................... และ ......................
……………….. และ ............……..
คำำตอบคือ ............................
กรณีที่ 2 ......................... และ ......................
……………….. และ ............……..
คำำตอบคือ ............................
ดังนั้น เซตคำำตอบของอสมกำรนี้คือ ................. ∪ .................
= ………………………
23. แบบฝึกที่ 13
ชื่อ........................................................................................
....ชั้น..........................เลขที่...........
1. Give the following P(x) .Find the value of P(c) .
(1) ( ) ( )3
P x x 2x 1 ;P 2= − + =
.......................................................................
(2) ( ) ( )4 3
P x x x 9x 3 ;P 3= − + + − =
..........................................................
(3) ( )
4 3 2 1
P x 2x 5x x 3x 1 ;P
2
= − − + + − = ÷
...........................................
(4) ( ) ( )3 2
P x 6x 11x 6x 1 ;P 1= − + − =
.........................................................
(5) ( ) ( )5
P x 3x 2x 1 ;P 1= − + − =
..................................................................
2. Find the remainders of the following question.
(1) 3 2
2x x 6x 3− − − หำรด้วย x 4−
...................................................................
(2) 3
9x 4x 1+ − หำรด้วย
1
x
2
−
...................................................................
(3) 4 3
x 5x 2x 3+ − − หำรด้วย 2x 1+
..................................................................
(4) 3 2
x 4x x 6− + + หำรด้วย x 3−
....................................................................
(5) 4 2
x 2x 1− + หำรด้วย
1
x
2
−
.....................................................................
3. Find the remainders of the following question.
(1) ( ) ( )2
2x 4x 8 x 2− + ÷ −
25. (1) ( )
4 3
P x 2x 6x 3x 4 , c 3= + + − = −
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
(2)
3 2
2x 3 2x 8 , c 2− + − =
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
5. จงแสดงว่ำ x – 2 เป็นตัวประกอบของ
3 2
2x 3x x 6− + −
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
6. จงแสดงว่ำ x – 4 เป็นตัวประกอบของ
3 2
2x 7x 3x 4− − −
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
26. 7. ถ้ำ ( )
3 2
P x 3x kx 1= − + ซึ่ง ( )P 1 2= จงหำ ( )P 3
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
8. (1) จงแยกตัวประกอบ
4 2
2x 3x 12x 7x 6− − + +
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
(2) จงแยกตัวประกอบ
4 3 2
x 3x 4x 10x 6− − − −
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
(3) จงแยกตัวประกอบ
4 3 2
2x x 7x 4x 4− + − −
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
7. จงหำเศษโดยใช้กำรหำรยำวและทฤษฎีเศษเหลือ
27. (1) ( ) ( )3 2
x 2x x 2 x 1+ − − ÷ −
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
(2) ( ) ( )3 2
x 3x x 2 x 2− − + ÷ −
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
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……………………………………………………………………………
…………………………………..
(3) ( ) ( )3 2
x 2x 3 x 1+ + ÷ +
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
(4) ( ) ( )4 3 2
x 4x x x 100 x 3− − + − ÷ +
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
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……………………………………………………………………………
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28. (5) ( ) ( )5 2
2x x 8x 44 x 2− + + ÷ +
……………………………………………………………………………
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……………………………………………………………………………
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……………………………………………………………………………
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…………………………………..
8. Find the answer of the following equaltions.
(1) 3 2
x 2x x 2 0+ − − =
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
(2) 3 2
x x 5x 3 0+ − + =
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
(3) 3 2
x 2x 5x 6 0+ − − =
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
29. (4)
3
x 1 0+ =
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
(5) 3 2
2x 5x 28x 15 0− − + =
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
(6) 3 2
2x x 3x 1 0− − − =
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
(7) 3 2
x 11x 5x 3 0+ + − =
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
(8) 3 2
4x 5x 23x 6 0− − + =
……………………………………………………………………………
…………………………………..
30. ……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
(9) 4 2
x 11x 12x 4 0− − + =
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
(10) 4 3 2
x x 2x 4x 8 0+ − − − =
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
……………………………………………………………………………
…………………………………..
แบบฝึกที่ 14
ชื่อ........................................................................................
....ชั้น..........................เลขที่...........
Find the set of answer of inequalities by
graph method.
1) Find the answer of inequalities of x2
– 3x – 10 < 0
วิธีทำำ ถ้ำ x2
– 3x – 10 = 0
จะได้ (x + 2)(x – 5) = 0
x = -2 , 5
แต่ x2
– 3x – 10 < 0
จะได้ (x + 2)(x – 5) < 0
+ – +
-2 5
31. ดังนั้น เซตคำำตอบของอสมกำรนี้คือ..................................
2) Find the answer of inequalities of x2
+ 4x – 12 ≥ 0
วิธีทำำ
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
3) Find the answer of inequalities of 3x2
– 4x + 2 <
0
วิธีทำำ
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
33. 5) Find the answer of inequalities of x3
+ 2x2
< 5x +
6
วิธีทำำ
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
6) Find the answer of inequalities of 2x3
– 3x2
– 11x +
6 ≤ 0
วิธีทำำ
……………………………………………………………………
….
……………………………………………………………………
….
36. ……………………………………………………………………
….
3) Find the answer of inequalities of 1
3
5
−≥
+
x
x
วิธีทำำ
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
4) Find the answer of inequalities of 4
52
≤
−
x
x
วิธีทำำ
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
38. ……………………………………………………………………
….
6) Find the answer of inequalities of 1
43
4
2
<
−−
−
xx
x
วิธีทำำ
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
……………………………………………………………………
….
แบบฝึกที่ 16
39. ชื่อ........................................................................................
....ชั้น..........................เลขที่...........
Write in front of the correct sentence
and write in front of the incorrect sentence.
……….. 1) 8282 +−=+−
……….. 2) 82)8(2 −+−=−+−
……….. 3) 8282 −=−
……….. 4) 82)8(2 −−=−−
……….. 5) 5.4)5)(4( =
……….. 6) 5.4)5)(4( −=−
……….. 7) 5.4)5)(4( −−=−−
……….. 8) 5
4
5
4 −
=−
……….. 9) )10(10 22
−=−
………..10) 9393 −−≤−−
Fine the answer of the following sentences.
1) 715 +− = ………………………….
2) 1010 −+− = ………………………….
3) )12(5− = ………………………….
4) )12(5 −− = ………………………….
5)
2
3− = ………………………….
6) 4
15
− = ………………………….
7) 4
15
− = ………………………….
8) )8(7 −+− = ………………………….
9) )8(7 −+ = ………………………….
10)
22
54 −+ = ………………………….
แบบฝึกที่ 17
ชื่อ........................................................................................
....ชั้น..........................เลขที่...........
40. คำำสั่ง Write the correct answer in the following
blanks.
1) Find the answer of equation of 352 =−x
วิธีทำำ จำก 352 =−x
จะได้ 2x – 5 = …….. หรือ
2x – 5 = ………
x = …….. x =
………
ดังนั้น เซตคำำตอบของสมกำรคือ
..........................................................
2) Find the answer of equation of 152 +=− xx
วิธีทำำ จำก 152 +=− xx
จะได้ 2x – 5 = ……… หรือ 2x – 5 =
………
2x …… = ……… 2x …… = ………
x = ……… x =
………
ตรวจคำำตอบ แทน x ด้วย ........... จะได้
.........................................
.........................................
แทน x ด้วย............ จะได้
..........................................
.......
...................................
ดังนั้น เซตคำำตอบของสมกำรคือ
..........................................................
3) Find the answer of equation of 521 −=+ xx
วิธีทำำ จำก 521 −=+ xx
ยกกำำลังสอง , 22
)52(1 −=+ xx
x2
+ 2x + 1 = 4x2
– 20x + 25
………………. = 0
(.………)(……….) = 0
x = ………….
ตรวจคำำตอบ แทน x ด้วย ........... จะได้
.........................................
.........................................
41. แทน x ด้วย............ จะได้
..........................................
.......
...................................
ดังนั้น เซตคำำตอบของสมกำรคือ
..........................................................
4) Find the answer of equation of 912 =−x
วิธีทำำ
............................................................................................
.....................
..........................................................................
.......................................
..........................................................................
.......................................
..........................................................................
.......................................
..........................................................................
.......................................
5) Find the answer of equation of xx −=+ 232
วิธีทำำ
............................................................................................
.....................
..........................................................................
.......................................
..........................................................................
.......................................
..........................................................................
.......................................
..........................................................................
.......................................
..........................................................................
.......................................
..........................................................................
.......................................
6) Find the answer of equation of 322 +=− xx
43.
คำำสั่ง Write the correct answer in the following
blanks.
1) 8<x 2) 9>x
........ < x < …… x < ……..
หรือ x > ………
∴ เซตคำำตอบคือ ............................ ∴ เซตคำำตอบ
คือ ..........................
3) 10≤x 4) 12≥x
........ ≤ x ≤ …… x ≤ ……..
หรือ x ≥ ………
∴ เซตคำำตอบคือ ............................ ∴ เซตคำำตอบ
คือ ............................
5) 0<x 6) 0>x
………………………………….
………………………………….
∴ เซตคำำตอบคือ ............................ ∴ เซตคำำตอบ
คือ ............................
7) 02 ≤+x 8) 02 ≥+x
………………………………….
………………………………….
………………………………….
………………………………….
∴ เซตคำำตอบคือ ............................ ∴ เซตคำำตอบ
คือ ............................
9) 1132 <−x 10) 732 >+x
………………………………….
………………………………….
………………………………….
………………………………….
………………………………….
………………………………….
∴ เซตคำำตอบคือ ............................ ∴ เซตคำำตอบ
คือ ............................
44. 11) 513 ≤+x 12) 813 ≥−x
………………………………….
………………………………….
………………………………….
………………………………….
………………………………….
………………………………….
∴ เซตคำำตอบคือ ............................ ∴ เซตคำำตอบ
คือ ............................
คำำสั่ง Find the answer of the following Absolute
value inequalities.
1) 272 +≤+ xx
วิธีทำำ
............................................................................................
.................
.........................................................................
....................................
.........................................................................
....................................
.........................................................................
....................................
.........................................................................
....................................
.........................................................................
....................................
2) 153 −<− xx
วิธีทำำ
.....................................................................................
........................
....................................................................................
.........................
.....................................................................................
........................
46. .....................................................................................
........................
.....................................................................................
........................
5) 3472 −≥+ xx
วิธีทำำ
............................................................................................
.................
.........................................................................
....................................
.........................................................................
....................................
.........................................................................
....................................
.........................................................................
....................................
.........................................................................
....................................
6) 2
3
≤
+x
x
วิธีทำำ
............................................................................................
.................
.........................................................................
....................................
.........................................................................
....................................
.........................................................................
....................................
.........................................................................
....................................
.........................................................................
....................................
7) 1
2
12
>
−
+
x
x
48. แบบฝึกที่ 19
ชื่อ........................................................................................
....ชั้น..........................เลขที่...........
คำำสั่ง Write () which one is correct of the
following questions.
1) Set of the answer of
inequalities of 3x2
> 3x
ก. ),0()1,( ∞∪−−∞
ข. ),1(),( ∞∪−∞ o
ค. )0,1(−
ง. )1,0(
2) Set of the answer of
inequalities of
(x-2)(x+1)(x-3) ≤ 0
ก. ]3.2[]1( ∪−−∞
ข. ),3[]2,1[ ∞∪−
ค. ]1.2[]3( −∪−−∞
ง. ),1[]2,3[ ∞∪−−
3) Set of the answer of
inequalities of
x(x+2)2
(x+3)3
> 0
ก. ),0()2,3( ∞∪−−
ข. )0,2()3,( −∪−−∞
ค. ),0()3,( ∞∪−−∞
ง. ),2()3,( ∞−∪−−∞
4) Set of the answer of
inequalities of 1
2
1
≥
+x
ก. )1,2[−
ข. ]1,2(−
ค. )1,2[ −−
ง. ]1,2( −−
5) Set of the answer of
inequalities of 0
4
)5()3( 32
<
+
−−
x
xx
ก. )4,5(−
ข. )5,4(−
6) Set of the answer of
inequalities of
(x2
+1)(x – 1) ≤ 0
ก. ]1,1[−
ข. ),1[ ∞−
ค. ]1,(−∞
ง. ),1[]1,( ∞∪−−∞
7) Set of the answer of
equation of 732 =−x
ก. { 5 }
ข. { -2 }
ค. { -5 , 2 }
ง. { -2 , 5 }
8) Set of the answer of
equation of xx −=− 732
ก. { }
ข. { 3
10
}
ค. { 4− }
ง. { 3
10
.4− }
9) Set of the answer of
inequalities of 532 >+x
ก. ),1()4,( ∞∪−−∞
ข. ),4()1,( ∞∪−−∞
ค. )1,4(−
ง. )4,1(−
10) Set of the answer of
inequalities of 032 ≤+x
ก. R
ข. { }
49. ค. ),4()5,( ∞∪−−∞
ง. ),5()4,( ∞∪−−∞
ค. { 2
3
− }
ง. R - { 2
3
− }
ต่อหน้ำที่ 2
11) Set of the answer of
inequalities of xx 2332 −<+
1. R
2. )0,(−∞
3. ),
2
3
( ∞−
4. )
2
3
,(−∞
12) Set of the answer of
inequalities of 132 −>+ xx
ก. )
3
2
,4(−
ข. )4,
2
3
(−
ค. ),
3
2
()4,( ∞∪−−∞
ง. ),
3
2
()4,( ∞−∪−−∞
13) กำำหนดให้ A = { x / x2
–
3x + 1 ≥ 0 }
B = { x /
252 ≤−x }
ถ้ำ A ∩ B = [ a , b] แล้ว
a + b มีค่ำเท่ำกับ
ข้อใดต่อไปนี้.
ก. 2
5
5 +
ข. 2
5
5 −
ค. 2
5
10 +
ง. 2
5
10 −
14) ถ้ำเซตคำำตอบของอสมกำร
62 ≤−≤ xx คือ
[ a , b] แล้ว a + b มีค่ำ
เท่ำกับข้อใดต่อไปนี้.
1. 9
2. 10
3. 12
4. 13
15) ถ้ำ A และ B เป็นเซตคำำ
ตอบของอสมกำร
1
4
23
2 <
−
<−
x
และ 0
5
4
<
−
+
x
x
ตำมลำำดับ
แล้ว ผลบวกของสมำชิกที่เป็น
จำำนวนเต็มทั้งหมด
ของ A ∪ B คือข้อใดต่อไป
นี้.
1. 9
2. 15
3. 17
4. 19