1. If the product of n positive real numbers is unity, then their sum is necessarily
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By: anil on 05 May 2019 02.30 am
Let the numbers be $$a_1,a_2....a_n.$$ Since the numbers are positive, $$AMgeq GM$$ $$frac{a_1+a_2+a_3....+a_n}{n}geq (a_1*a_2....*a_n)^{1/n}$$ $$a_1+a_2+a_3....+a_n geq n$$
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