C5_W1’s Quiz: Sarah and Ashely

[Deepti_Prasad]

Hello,

@anon76241992

I understand that if gamma_u = 0 , then Ct = Ct-1 , right? This should be what meant by highly dependent to the previous memory cell

Yes the question mentions without vanishing gradient problems and in the options it mentions while back propagating without much decay.

this question’s answer is more based on both what questions mentions about Sarah’s and Ashley’s model which need to be correlated with the options and then removing two of the options which can be done clearly once you read the question.

then as you understand that c^t should be dependent on c^t-1, we want the gamma u to be 0 so the sequence remembers the previous cells and does not update. Gamma u is basically tells the sequence when to update.

where as gamma r is reference based which will get updated as per the question as here the gamma_r is 1, so the sequence will get updated to the current memory cell. So with this understanding, you can know which is the correction option.

I am also sharing a link which explains the same. Read the whole post comments as the learner from that post was also confused.

Sequence Models Week 1 Quiz

Yes at last you got it, more than distortion. the main difference between gamma u and gamma r is it significance in activation of the sequence at each timestep. gamma u basically will tell the model when to update the parameter and if you choose 0, you are telling model not to update while propagating without much decay where as gamma r is the relevance of choosing 1 always (based on the sentence in question) to update the sequence if current value is in sequence with previous sequence memory …

Regards
DP