Derivative of sigmoid

Question

I\'m creating a neural network using the backpropagation technique for learning.

I understand we need to find the derivative of the activation function used. I\'m using

Answer 1

You can use the output of your sigmoid function and pass it to your SigmoidDerivative function to be used as the f(x) in the following:

dy/dx = f(x)' = f(x) * (1 - f(x))