Question

y=(√x+1)(1/√x-1)的导数

Answer 1

y=(√x+1)(1/√x-1)

=(√x+1)/(√x-1)

=(x+2√x+1)/x

y'=(1+1/√x)-(x+2√x+1)/x^2

=(1/√x-x-2√x)/x^2

=(1-x*√x-2x)x^2*√x