设f (x)为可导函数,且满足 lim x→0 f(1)-f(1-x) 2x =-1,则曲线y=f (x)在点
设f(x)为可导函数,且满足limx→0f(1)-f(1-x)2x=-1,则曲线y=f(x)在点(1,f(1))处的切线的斜率是()A.2B.-1C.12D.-2...
设f (x)为可导函数,且满足 lim x→0 f(1)-f(1-x) 2x =-1,则曲线y=f (x)在点(1,f(1))处的切线的斜率是( ) A.2 B.-1 C. 1 2 D.-2
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