已知f′(−3)=−2f'(-3) = -2f′(−3)=−2,则limx→−3f(x)−f(−3)x+3=\lim\limits_{x \to -3} \dfrac{f(x) - f(-3)}{x + 3} =x→−3limx+3f(x)−f(−3)=( ).
(A)−2-2−2
(B)000
(C)222
(D)不存在
Copyright ©