Question

If $3^a$ = $b^2$, find the minimum value of a + b

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• A. 4
• B. 5
• C. 3
• D. 6

Answer 1

The correct option is B

5

$3^a$ = $b^2$

For minimum value of a+b

Equate bases and exponents

$\Rightarrow$ 3=b and a=2

So, a+b = 3+2=5