y=(sin x)^lnx 对数求导
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y=(sin x)^lnx 对数求导
![y=(sin x)^lnx 对数求导](/uploads/image/z/6300234-18-4.jpg?t=y%3D%28sin+x%29%5Elnx+%E5%AF%B9%E6%95%B0%E6%B1%82%E5%AF%BC)
y = (sinx)^lnx
lny = (lnx) ln(sinx)
(1/y) y' = (lnx) (1/sinx) cosx + (ln(sinx)) 1/x
= (lnx) cotx + (1/x) lin(sinx)
y' = [(lnx) cotx + (1/x) lin(sinx)]y
= [(lnx) cotx + (1/x) lin(sinx)]((lnx) cotx + (1/x) lin(sinx))
再问: y=x根号下(1-x)/(1+x) y=(x^2/1-x)*根号下(5-x)/(3+x)^2
lny = (lnx) ln(sinx)
(1/y) y' = (lnx) (1/sinx) cosx + (ln(sinx)) 1/x
= (lnx) cotx + (1/x) lin(sinx)
y' = [(lnx) cotx + (1/x) lin(sinx)]y
= [(lnx) cotx + (1/x) lin(sinx)]((lnx) cotx + (1/x) lin(sinx))
再问: y=x根号下(1-x)/(1+x) y=(x^2/1-x)*根号下(5-x)/(3+x)^2