InterviewSolution
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T_(n) =sum _( r =2n )^(3n-1) (r)/(r ^(2) +n ^(2)), S_(n) = sum _(r =2n+1)^(3n) (r )/(r ^(2) + n ^(2)), thenAA n in {1,2,3...}: |
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Answer» `T_(n ) GT 1/2 LN 2` |
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