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lim(n-gtoo)(1-2+3-4+5-6+-2n)/(sqrt(n^2+1...

`lim_(n-gtoo)(1-2+3-4+5-6+-2n)/(sqrt(n^2+1)+sqrt(4n^2-1))=1)1/3 2)-1/33) -1/54)1/5`

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