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 設函數(shù)u=g(x)在點x處可導,函數(shù)y=f(u)在點u處可導,則復合函數(shù)y=f[g(x)]在點x處可導,且其導數(shù)為證明略.復合函數(shù)的求導法則可以推廣到有限個函數(shù)復合的情形.若y=f(u),u=g(v),v=h(x)都在相應點可導,則復合函數(shù)y=f[g(h(x))]在點x處可導,且例2-11 設 (共 347 字) [閱讀本文] >>