Find the derivative of f(x)=1x2+1f(x) = \frac{1}{\sqrt{x^2+1}}f(x)=x2+11.
−x/(x2+1)3/2-x / (x^2+1)^{3/2}−x/(x2+1)3/2
x/(x2+1)3/2x / (x^2+1)^{3/2}x/(x2+1)3/2
1/(x2+1)1 / (x^2+1)1/(x2+1)
None