问题
解答题
计算(1)求积分值:
(2)求函数y=
|
答案
(1)
(3x2+4x3)dx=∫ 20
3x2dx+∫ 20
4x3dx=x3|∫ 20
+x4| 20
=24. 20
(2)y=
+1 1- x
=1 1+ x
=1+
+1-x x (1-
)(1+x
)x
,2 1-x
∴y′=(
)′=2 1-x
=-2(1-x)′ (1-x)2
.2 (1-x)2
计算(1)求积分值:
(2)求函数y=
|
(1)
(3x2+4x3)dx=∫ 20
3x2dx+∫ 20
4x3dx=x3|∫ 20
+x4| 20
=24. 20
(2)y=
+1 1- x
=1 1+ x
=1+
+1-x x (1-
)(1+x
)x
,2 1-x
∴y′=(
)′=2 1-x
=-2(1-x)′ (1-x)2
.2 (1-x)2