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Question

If the product of n positive numbers is unity, then the sum of these numbers can not be less than

A
2n
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B
n
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C
n+1
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D
n+7
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Solution

The correct option is B n
We know A.M.G.M
x1+x2++xnnnx1x2xn(x1x2xn=1)x1+x2++xnn1x1+x2++xnn

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