Let (left{A_{n}ight}_{n=1}^{infty}) be a sequence of events from (mathcal{F}), a (sigma)-field on the sample space (Omega=mathbb{R}), defined
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Let \(\left\{A_{n}ight\}_{n=1}^{\infty}\) be a sequence of events from \(\mathcal{F}\), a \(\sigma\)-field on the sample space \(\Omega=\mathbb{R}\), defined by \(A_{n}=\left(-1-n^{-1}, 1+n^{-1}ight)\) for all \(n \in \mathbb{N}\). Compute
\[\begin{aligned}& \liminf _{n ightarrow \infty} A_{n}, \\& \limsup A_{n},\end{aligned}\]
and determine if the limit of the sequence \(\left\{A_{n}ight\}_{n=1}^{\infty}\) exists.
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