y=(1/2)[ln(1-sinx)-ln(1+sinx)]為什么等于故y`=(1/2)[(-cosx)/(1-sinx)-(cosx)/(1+six)
y=(1/2)[ln(1-sinx)-ln(1+sinx)]為什么等于故y`=(1/2)[(-cosx)/(1-sinx)-(cosx)/(1+six)
數(shù)學(xué)人氣:660 ℃時間:2020-09-12 07:37:16
優(yōu)質(zhì)解答
首先f(x)=lnx,f'(X)=1/X (X>0)而f(x)=sinx,f'(x)=cosx和f(x)=cosx,f'(x)=-sinx又由函數(shù)乘積的求導(dǎo)公式:(uv)'=uv'+vu'和復(fù)合函數(shù)的求導(dǎo)公式:f[g(x)]=f'[g(x)]g'(x)在套公式,y=(1/2)[ln(1-sinx)-ln(1+sinx)]得導(dǎo)數(shù)y`=...
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