2. ∶
∶

3. +
= 12
= 12
= −12
=7
= −7
(−2)
− 6 − 4 − 87 = 0
= −7
=7
= −7
= −12
= −12
( )= 2 + 1
( ° )( + 1) = −2
=
−3
−4 −1
( )=2
+9

4. −
2
= (−1 2 3)
−
| | = √6
−
.
+
= (
=0
4
)
.
= (−4 8 − 3)
−
=3
=
2 –3
=

5. = 3
(2, −10)
(2, 10)
(10, 2)
(−10, 2)
(10, −2)
{−4 ≤
{−5 ≤
{−4 ≤
{−5 ≤
{−5 ≤
−
−
0
( ,
≤ −1
< −2
< −1
≤ −2
< −1
)
= −2
(
(−4, 6)
+ − 2) ≤ 1
2 ≤ ≤ 5}
1 < ≤ 4}
2 < ≤ 5}
1 ≤ ≤ 4}
2 < ≤ 4}
5
− 26. 5 + 5 = 0
−
=8

6. sin
+2
2
+ sin
−2

7. 2 cos
2 sin 2
2 cos 2
cos 2
−
−
−
4 sin
+ 4 cos − 1 = 0
−
−
= −4 − 3
= +3
= −4
= −8
= −4 + 8
=2
−5
+7

8. ∫ (3 − 2)(4 + )
∫
sin +
cos +
sin +
cos +
cos
2
2
3
3
4
15
15
14
14
10
+
= 50
3