fun-lim

Question: If ${{x}_{n}}=\frac{1-2+3-4+5-6+.....-2n}{\sqrt{{{n}^{2}}+1}+\sqrt{4{{n}^{2}}-1}},$ then $\underset{n\to \infty }{\mathop{\lim }}\,{{x}_{n}}$ is equal to



1) $\frac{1}{3}$
2) $-\frac{2}{3}$
3) $\frac{2}{3}$
4) 1
Solution: Explanation: No Explanation
Limits

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