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If a1, a2, .... an are positive numbers such that a1.a2.a3 .... an = 1, then their sum is

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If a1, a2, .... an are positive numbers such that a1.a2.a3 .... an = 1, then their sum is

(a) a positive integer 

(b) divisible by n 

(c) never less than n 

(d) none of these

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(c) never less than n

For positive numbers we know that AM > GM

⇒ a1 + a2 + a3 + .... + an > n.

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