Alden Tan's answer to vaelyn's Secondary 3 A Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Alden Tan
Alden Tan's answer
9 answers (Tutor Details)
The key to this question is to use the Tr+1 formula and find out the terms that the question wants!

I hope this helps!