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

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Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
1st
This one max min is always the same technique.

There is another method using calculus (later topic), but it’s not very efficient.
Kathy
Kathy
5 years ago
You also can just show calculus
But I won’t use it