Jia Earn Lim's answer to elly's Secondary 4 A Maths Singapore question.

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Jia Earn Lim
Jia Earn Lim's answer
96 answers (Tutor Details)
1st
I did most of the explanation in the working, hope this helps ;) It is important to note where are the x-cords located “roughly” in f’’(x) to identify if it’s greater than or less than 0. e.g. at point a, it is less than -p where f’’(x) is greater than 0.