Sathya Gananaathaa's answer to Jolyn Tan's Secondary 4 E Maths question.

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Sathya Gananaathaa
Sathya Gananaathaa's answer
4 answers (A Helpful Person)
1st
I tried using differentiation method, but it was complicated and the answer I got was in decimal. So, I tried using the simplest method to solve this question. I am not whether your teacher will accept. I hope it helps.