f(x)=xlnx/(x-1) -2ln(1+x^(1/2))怎么求导

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f(x)=xlnx/(x-1) -2ln(1+x^(1/2))怎么求导
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f(x)=xlnx/(x-1) -2ln(1+x^(1/2))怎么求导
f(x)=xlnx/(x-1) -2ln(1+x^(1/2))怎么求导

f(x)=xlnx/(x-1) -2ln(1+x^(1/2))怎么求导
f'(x)=[xlnx/(x-1) -2ln(1+√x)]'
=[xlnx/(x-1)]' -[2ln(1+√x)]'
=[(x-1)(xlnx)'-(xlnx)(x-1)']/(x-1)²-2(1+√x)'/(1+√x)
=[(x-1)(1+lnx)-xlnx]/(x-1)²-2(1/(2√x))/(1+√x)
=(x-1-lnx)/(x-1)²-1/(x+√x).