作业帮limh→0[f（x-2h）-f（x）]/3h=?
来源：学生作业帮助网 编辑：作业帮 时间：2024/09/30 23:21:44
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limh→0[f（x-2h）-f（x）]/3h=?
limh→0[f（x-2h）-f（x）]/3h=?
limh→0[f（x-2h）-f（x）]/3h=?
lim[f(x-2h)-f(x)]/3h
=lim[f(x-2h)-f(x)]/(-2h)·(-2/3)
=-2/3·lim[f(x-2h)-f(x)]/(-2h)
= -2/3·f '(x)