Eric's answer to Amy Pond's Junior College 2 H1 Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Eric
Eric's answer
22 answers (A Helpful Person)
1st
All workings are given in the photo.

Remember that dimensions are positive, ignore all negative values of r.

Thrrefore curve of S is in 1st quadrant