Find the derivative of f(x)=11+e−xf(x) = \frac{1}{1+e^{-x}}f(x)=1+e−x1.
e−x(1+e−x)2\frac{e^{-x}}{(1+e^{-x})^2}(1+e−x)2e−x
−e−x(1+e−x)2\frac{-e^{-x}}{(1+e^{-x})^2}(1+e−x)2−e−x
exe^xex
None