Find the derivative of f(x)=x2/(x+1)f(x) = x^2 / (x+1)f(x)=x2/(x+1).
x2+2x(x+1)2\frac{x^2+2x}{(x+1)^2}(x+1)2x2+2x
2x1\frac{2x}{1}12x
2x/(x+1)22x/(x+1)^22x/(x+1)2
None