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[单选题]
设f(u)可导,且u=ex,则[f(ex)]'=( )。
A.exf'(ex)
B.f'(u)
C.ex[f(ex)]'
D.f'(ex)
查看答案
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.exf'(ex)
B.f'(u)
C.ex[f(ex)]'
D.f'(ex)
设函数f(u)可微,且f(0)=
,则z=f(4x2-y2)在点(1,2)处的全微分
=________。
设函数f(u)可导,y=f(x2)当自变量x在x=-1处取得增量△x=-0.1时,相应的函数增量△y的线性主部为0.1,则fˊ(1)=().
A.﹣1
B.0.1
C.1
D.0.5