y=log2(x) * log4(x)的導數幫忙看看這樣爲什麽不行?y=log2(x) * log4(x)=log2(x) *(12)log2(r)=(12)[log2(r)]^2求導y'=(12)*2*[log2(r)]*1[r(In2)]我覺
幫忙看看這樣爲什麽不行?
y=log2(x) * log4(x)
=log2(x) *(1/2)log2(r)
=(1/2)[log2(r)]^2
求導
y'=(1/2)*2*[log2(r)]*1/[r(In2)]
我覺得這樣也對阿 爲什麽不對?
2(Inr)/r(In2)(In4)
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