Derek Goh's answer to S's Junior College 2 H2 Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Derek Goh
Derek Goh's answer
17 answers (A Helpful Person)
1st
P.S. You can find solutions to all GCE A-level questions on my website http://infinitymaths.sg