If e = {xe r|x = 1/n - (-1), for n e n - {0}), then inf(e) =

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infimum is -1.

there will be two subsequences of numbers . for even n ::. 1/n -1 for odd n ::: 1/n+1 infimum is given by even subsequence that is -1. bcoz each even number n elements will be g...