Eric Nicholas K's answer to Wen Li's Junior College 1 H2 Maths Singapore question.

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Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
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J
J
4 years ago
Actually no need to use calculator for second derivative
Eric Nicholas K
Eric Nicholas K
4 years ago
True, the numbers can be easily estimated
J
J
4 years ago
Or rather, simplifying it gives -4n√3. Since n > 0, 4n√3 > 0 and therefore -4n√3 < 0