设函数f(x)在点x0附近有定义,且有f(x0+Δx)-f(x0)=aΔx+b(Δx)2(a、b为常数),

设函数f(x)在点x0附近有定义,且有f(x0x)-f(x0)=aΔx+bx)2(ab为常数),则(    )

A.f′(x)=a                B.f′(x)=b

C.f′(x0)=a              D.f′(x0)=b

答案

分析:本题主要考查导数的概念.

解:∵f(x0x)-f(x0)=aΔx+bx)2(ab为常数),

f′(x0)=

=(a+bΔx)=a.

答案:C

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