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[" 12.) If "lim(n rarr oo)(sqrt(2n^(2)+n...

[" 12.) If "lim_(n rarr oo)(sqrt(2n^(2)+n)-lambda sqrt(2n^(2)-n))=(1)/(sqrt(2))" (where "lambda" is a real number),then- "],[[" (A) "lambda=1," (B) "lambda=-1," (C) "lambda=+-1]]

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