设f′(x0)=3f'(x_0)=3f′(x0)=3,则limΔx→0f(x0−Δx)−f(x0)Δx=\lim\limits_{\Delta x \to 0}\dfrac{f(x_0 - \Delta x)-f(x_0)}{\Delta x} =Δx→0limΔxf(x0−Δx)−f(x0)=( ).
(A)333
(B)−3-3−3
(C)111
(D)−1-1−1
Copyright ©