第1198题：导数计算法则
以下导数运算法则中，正确的是( ).
A. [f(x)±g(x)]′[f(x) \pm g(x)]'[f(x)±g(x)]′=f′(x)±g′(x) = f'(x) \pm g'(x)=f′(x)±g′(x)
B. [f(x)±g(x)]′[f(x) \pm g(x)]'[f(x)±g(x)]′ =f′(x)g(x)±f(x)g′(x)= f'(x)g(x) \pm f(x) g'(x)=f′(x)g(x)±f(x)g′(x)
C. [f(x)⋅g(x)]′ [f(x) \cdot g(x)]'[f(x)⋅g(x)]′ =f′(x)g′(x)= f'(x) g'(x)=f′(x)g′(x)
D. [f(x)⋅g(x)]′ [f(x) \cdot g(x)]'[f(x)⋅g(x)]′ =f′(x)g(x)+f(x)g′(x)= f'(x) g(x) + f(x) g'(x)=f′(x)g(x)+f(x)g′(x)
