Derivatives, Sigmoid Function, Tanh Function, Relu.
to, turns out to be 0 , if z is less than 0 and 1 if z is greater than 0. It’s actually undefined, technically undefined if z is equal to exactly 0. But if you’re implementing this in software, it might not be a 100 percent mathematically correct, but it’ll work just fine if z is exactly a 0, if