y=(x-1)/(x+1)求导求下列函数的导数y=(x-1)/(x+1)y=(1-根号x)(1+根号x)y=（x根号x/三次根号x）cosxy=xsinx+根号下xy=Inx/x+1-2^x

Question

y=(x-1)/(x+1)求导
求下列函数的导数
y=(x-1)/(x+1)
y=(1-根号x)(1+根号x)
y=（x根号x/三次根号x）cosx
y=xsinx+根号下x
y=Inx/x+1-2^x

Answer 1

y=(x-1)/(x+1)=1 - 2/(x+1)y'=2/(x+1)^2y=(1-√x)(1+√x)=1-xy'=-1y=（x根号x/三次根号x）cosx=x^(7/6)*cosxy'=(7/6)x^(1/6)*cosx - x^(7/6)*sinxy=xsinx+√x = xsinx + x^(1/2)y'=sinx+x*cosx + 1/(2√x)y=Inx/x+1-...