对于函数f(x)=(x-1)^(-2) 不存在一个点c使得该函数的导数在该点等于0,
人气:250 ℃ 时间:2019-07-29 19:29:01
解答
解由f(x)=(x-1)^(-2) =1/(x-1)^2 (x≠1)则f'(x)={1'[(x-1)^2]-1×[(x-1)^2]'}/(x-1)^4={-1×[2(x-1)^1](x+1)'}/(x-1)^4={-1×[2(x-1)^1]}/(x-1)^4=-2/(x-1)^3(x≠1)则由x≠1知-2/(x-1)^3≠0即f'(x)...
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