[分析] 初微(48)

[TaiwanBank (澳仔金控台灣分行)]

Suppose f'(x),g'(x) exist, g'(x)≠0, and f(x)=g(x)=0.  Prove that

        lim f(t)/g(t) = f'(x)/g'(x)
       t→x

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