Need clarification on function parameter

Course Q&A Deep Learning Specialization Neural Networks and Deep Learning
1 
def linear_activation_forward(A_prev, W, b, activation):
    ...
    return A, cache

This is the in-build function provided. All other parameters are derived. But I’m confused about the activation(ReLU and Sigmoid). Do we need to implement or can we get this from somewhere?

2

Those functions are provided for you in an “import” file. Have a look at the first code cell in the notebook. If you want to look at how those functions are implemented, there’s a topic about that on the DLS FAQ Thread.