EasyCalculusca-336

Sigmoid Second Derivative Vector

Problem

The sigmoid has second derivative sigmoid(z) * (1 - sigmoid(z)) * (1 - 2 * sigmoid(z)).

Given the values z, return the second derivative list.

Hint

Differentiate s(1 - s) once more with the chain rule.

case 1

in: [[0,1,-1]]

expected: [0,-0.09085774767294842,0.09085774767294842]

case 2

in: [[2,-2]]

expected: [-0.07996250105615312,0.07996250105615305]

case 3

in: [[0.5,3]]

expected: [-0.05755679485232076,-0.04089157466094337]

Starter codePython

def sigmoid_second_derivative(values):
    # Your code here
    pass

3 test cases · run your code against them in the editor