...題目有錯,f(99)應該是一個常數(shù)值,導數(shù)為0,應該是求F'(99)的導數(shù)值
解:F(X)中的第N個因子為(X-N)
根據(jù)對F(X)*G(X)……*H(G)的求導定理可知:
在F(X)的導數(shù)中除去對(X-99)項的求導外,其它的求導所得式子中都含有(X-99)的項,所以,當X=99時,這些項的值為都為0
所以所求的值為:F'(99)=98*97*96……*1*(-1)
=-98!
已知f(x)=(x-1)(x-2)(x-3).(x-100),求f(99)的導數(shù)
已知f(x)=(x-1)(x-2)(x-3).(x-100),求f(99)的導數(shù)
數(shù)學人氣:721 ℃時間:2020-02-02 12:33:22
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