Question

The product of n positive numbers is unity Then their sum is
(a) a positive integer
(b) divisible by n
(c) equal to n+$\frac{1}{n}$
(d) never less than n

Answer 1

their sum is positive because (+)+(+)=+

Answer 2

Their sum is positive because (+) × (+) = (+)

and (-) × (-) = (+)

also (-) × (+) = (-)