1.
y’=-(x-1)=1-x
2.
y’=1/(√(1-[(1-x^2)/(1+x^2)]^2)*(-4x^3/(1+x^2)^2)
=-4x^3/(1+x^2)*1/√(4x^2)
=-2x^3/[|x|(1+x^2)]
3.
y’=1/(x+√(x^2+1))*(1+2x/(2√(x^2+1)))
=1/√(x^2+1)
1.
y’=-(x-1)=1-x
2.
y’=1/(√(1-[(1-x^2)/(1+x^2)]^2)*(-4x^3/(1+x^2)^2)
=-4x^3/(1+x^2)*1/√(4x^2)
=-2x^3/[|x|(1+x^2)]
3.
y’=1/(x+√(x^2+1))*(1+2x/(2√(x^2+1)))
=1/√(x^2+1)