In the fig, second line partial derivative of O^L w.r.t Z^L should be f’(z^L). I think. Please check once.

Hi @Prabhakar_kumar, Thank you for catching that mistake. You’re right—it should indeed be f’(z^L) instead of f’(o^L). We’ve addressed this issue and updated the lesson accordingly. Your attention to detail is greatly appreciated! If you have any further questions or notice anything else, please don’t hesitate to let us know.