This is the error that I get - I checked my code on theta_plus and theta_minus like what other posts were suggesting, but I am pretty sure the formula was correct.

## Your backward propagation works perfectly fine! difference = 7.814075313343006e-11

AssertionError Traceback (most recent call last)

in

6 expected_values = [0.2850931567761623, 1.1890913024229996e-07]

7 assert not(type(difference) == np.ndarray), “You are not using np.linalg.norm for numerator or denominator”

----> 8 assert np.any(np.isclose(difference, expected_values)), “Wrong value. It is not one of the expected values”

AssertionError: Wrong value. It is not one of the expected values