Week 4 ,A1 Exercise 8

Hello l have this error l dont know which other values am not providing!

Sigmoid takes one parameter, and returns one variable.

Look at its function definition.

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Why are you calling the sigmoid function at all in linear_activation_backward? Please have another careful look at the instructions and formulas that you are implementing here.

Thanks it helped l dont know l was calling sigmoid ,l should have realised that it returns only 1 value.

Yes l was not supposed to call sigmoid there rather l had to call the "…cache "