• 2022-05-29
    设函数y=f(ex)ef(x),其中f(x)可导,则dy=()。
    A: ef(x)[exf'(x)+f'(ex)]dx
    B: ef(x)[exf'(ex)+f(ex)f'(x)]dx
    C: ef(x)[f'(ex)+f(ex)f'(x)]dx
    D: ef(x)[f'(ex)+exf(ex)f'(x)]dx