Eric Nicholas K's answer to mint's Secondary 4 A Maths Singapore question.

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Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
1st
Your techniques of differentiation are ok. But the re-expressing of the terms in the first two blue working lines is incorrect.
Eric Nicholas K
Eric Nicholas K
5 years ago
In other words, the '3' remains in the denominator.