• 试题 ID 20358


设 $f^{\prime}\left(x_0\right)$ 存在, 则 $\lim _{\Delta x \rightarrow 0} \frac{f\left(x_0-\Delta x\right)-f\left(x_0\right)}{\Delta x}=$.
A $f^{\prime}\left(x_0\right)$
B $-f^{\prime}\left(x_0\right)$
C $2 f^{\prime}\left(x_0\right)$
D 不存在
E
F
答案:

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解析:

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