Chứng minh rằng :
$ \prod_{n=2}^{\infty} \left ( \left ( \dfrac{n^2-1}{n^2} \right )^{2n^2-2} \left ( \dfrac{n+1}{n-1} \right )^{n} \right )=\pi $
Nice
Started By mai quoc thang, 19-09-2009 - 00:39
#1
Posted 19-09-2009 - 00:39
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