lim _(n arrow infty)(1-(1)/(2^2))(1-(1)/(3^2)) ...(1-(1)/(n^2))= ____

$\lim _{n \rightarrow \infty}\left(1-\frac{1}{2^{2}}\right)\left(1-\frac{1}{3^{2}}\right) \cdots\left(1-\frac{1}{n^{2}}\right)=$ ____

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