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運用複合函數求導法則求導log3f(x)導數就是對對數求一次導數再乘以f(x)的導數,如果f(x)也是複合函數,再進入裡面一層,這個就是複合函數的鏈式求導法則具體就是:[log3(cos^2 x)]'=1/(cos^2 x)ln3 *(cos^2 x)'=1/(c…
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