问题
解答题
求下列函数的导数 (1)y=xex (2)y=
|
答案
(1)y′=(xex)′=x′ex+x(ex)′=ex+xex=(1+x)ex.
(2)y′=(
)′=x-1 x+1
=(x-1)′(x+1)-(x-1)(x+1)′ (x+1)2
.2 (x+1)2
求下列函数的导数 (1)y=xex (2)y=
|
(1)y′=(xex)′=x′ex+x(ex)′=ex+xex=(1+x)ex.
(2)y′=(
)′=x-1 x+1
=(x-1)′(x+1)-(x-1)(x+1)′ (x+1)2
.2 (x+1)2