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lim(n->oo){1/(1-n^2)+2/(1-n^2)+......n/(...

`lim_(n->oo){1/(1-n^2)+2/(1-n^2)+......n/(1-n^2)} is equal to`

(a) 0
(b) `-1/2`
(c) `1/2`
(d) none of these

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