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lim n* [(1/(sqr(2n+1)-1)-1/(sqr(2n)+1))/(1/(sqr(2n+3)-1)-1/(sqr(2n+2)+1))-1] as n->inf
lim n* [(1/(sqr(2n+1)-1)-1/(sqr(2n)+1))/(1/(sqr(2n+3)-1)-1/(sqr(2n+2)+1))-1] as n->inf
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