differentiation

Question: The sum of two numbers is fixed. Then its multiplication is maximum, when

1) Each number is half of the sum

2) Each number is $\frac{1}{3}$ and $\frac{2}{3}$ respectively of the sum

3) Each number is $\frac{1}{4}$ and $\frac{3}{4}$ respectively of the sum

4) None of these

Solution:

Explanation: No Explanation

Maxima and Minima

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