设f（x）在x=x0处可导，且lim△x→0fx0+3△x-fx0△x=1，则f′（x0）等于_刷题宝

题干

设f（x）在x=x₀处可导，且lim△x→0

f

x

0

+

3

△

x

-

f

x

0

△

x

=1，则f′（x₀）等于（　　）

A：1

B： $- \frac{1}{3}$

C：-3

D： $\frac{1}{3}$

上一题下一题 0.0难度选择题更新时间:2019-02-27 03:08:59

答案(点此获取答案解析）

B

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