อิอิ ลองอ่านดูจ้าา เอามาฝากกัน

1. 1. (
O-NET
2549, 3
)
(1)
(2)
(3)
1.
2.
3.
4.
2
2.
O-NET
1.
2.
3.
4.
2
2549, 3
)

2. 3. (
O-NET
2549, 3
)
50
1.
60-69
2.
50
9
(
3.
)
1.
(
2.
(
3.
(
50-59
26%
)
4.
1
80
2)
10%
13
50
)
4.
�
80
10%
4
(
O-NET 2549, 2
)
A = { a, b, c }
B = { 0, 1 }
B
A
1. { (a,1), (b,0), (c,1) } 2. { (0,b), (1,a), (1,c) }
3. { (b,1), (c,0) }
(
4. { (0,c), (1,b) }
)
B
A
B
A…
1
…
4
3
2

3. (
O-NET 2549, 2
)
A – B = { 2, 4, 6 }, B – A = { 0, 1, 3 }
A ∪ B = { 0, 1, 2, 3, 4, 5, 6, 7, 8 }
A ∩B
1. { 0, 1, 4, 5, 6, 7 } 2. { 1, 2, 4, 5, 6, 8 }
3. { 0, 1, 3, 5, 7, 8 } 4. { 0, 2, 4, 5, 6, 8 }
(
)
A ∩ B = (A ∪ B) – (A – B) – (B – A) …
A ∩ B = { 5, 7, 8 }
3
3