Clarification grad. descent

Please I can’t understand where this formula came from

Hi @MoHassan,

You use the chain rule on the equations given on the slide. For example:

dL/dw1 = dL/dz * dz/dw1 = dL/dz * x1

I will leave the other two equations as an exercise.

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Got it, Thanks so much :grinning_face_with_smiling_eyes:

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