Eric Nicholas K's answer to kathy2's Secondary 4 A Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Eric Nicholas K
Eric Nicholas K's answer
2969 answers (Tutor Details)
Now that you have more or less known how to do the product rule and chain rule, I will prune down a few steps to make my workings shorter.