Course 1 Week 3 Programming exercise 6

How do we calculate dz1 in backward_propagation function?
I am calculating it this way

{moderator edit - solution code removed}

However the values of dW1 and db1 are not correct. Anyone can figure out the problem?

Hello, Nemat.

Welcome to the community.

All the instructions to work on the equations have already been provided. You need to be a bit careful while using them.

Thank you! Sorry my mistake ! I have read it wrong.