• 试题 ID 14969


已知 $f^{\prime}\left(x_0\right)=-1$, 则
$$
\lim _{x \rightarrow 0} \frac{x}{f\left(x_0-2 x\right)-f\left(x_0-x\right)}=
$$
A
B
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D
E
F
答案:

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解析:

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