求导:1:y=ln(1-x) 2:y=ln 1除以根号下1-x 3:y=ln根号下1-x 4:y=ln 1除以1-x

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求导:1:y=ln(1-x) 2:y=ln 1除以根号下1-x 3:y=ln根号下1-x 4:y=ln 1除以1-x

1,y=ln(1-x)
y'=1/(1-x)*(1-x)'=1/(1-x)*(-1)=1/(x-1);
2,y=ln [1/√(1-x)]=-ln √(1-x)
y'=-1/√(1-x)*[√(1-x)]'=-1/√(1-x)*[(1/2)*1/√(1-x)]*(1-x)'=-1/√(1-x)*[(1/2)*1/√(1-x)]*(-1)
=1/[2(1-x)]
3,y=ln √(1-x)
y'=-1/[2(1-x)]=1/[2(x-1)] (方法同2)
4,y=ln 1/(1-x)=-ln (1-x)
y'=-1/(x-1) (方法同1)

1:y=ln(1-x) =1/(1-x)×(-1)=1/(x-1)
2:y=ln 1除以根号下1-x =ln1/√(1-x)=√(1-x)×(-1/2×1/[(1-x)√(1-x)])(-1)=1/(2(1-x))
3:y=ln根号下1-x =ln√(1-x)=(1/√(1-x))×(1/2×1/√(1-x))×(-1)=1/(2(x-1))
4:y=ln 1除以1-x=ln1/(1-x)=(1-x)×(-1/(1-x)^2)×(-1)=1/(1-x)

1. 2/(x-1)
2.