Question

函數(shù)y=e^2x的導函數(shù)為（　�。�

A、y=e^2x

B、y=2e^2x

C、y=e^x

D、y=2e^x

Answer 1

分析：利用復合函數(shù)的導數(shù)運算法則：外函數(shù)的導數(shù)與內函數(shù)導數(shù)的乘積求出函數(shù)的導函數(shù)．

解答：解：y′=e^2x•（2x）′=2e^2x
故選B

點評：求一個函數(shù)的導函數(shù)，應該先判斷函數(shù)的形式，然后選擇合適的求導法則及公式．