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f(x)=x(x-1)(x-2)(x-3)(x-4) f'(1)=?
求详解
人气:291 ℃ 时间:2020-05-13 23:13:30
解答
f'(1)=lim(x->1)[f(x)-f(1)]/(x-1)
=lim(x->1)[x(x-1)(x-2)(x-3)(x-4)]/(x-1)
=lim(x->1)[x(x-2)(x-3)(x-4)]
=1×(-1)×(-2)×(-3)
=-61
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