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" 17."lim(A rarr oo)(1-2+3-4+5-6+...,-2n...

" 17."lim_(A rarr oo)(1-2+3-4+5-6+...,-2n)/(sqrt(n^(2)+1)+sqrt(4n^(2)-1))=1)

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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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