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Question Number 177131 by mokys last updated on 01/Oct/22

Commented by Frix last updated on 02/Oct/22

$$\frac{\frac{1}{1\times 2}+\frac{1}{3\times 4}+...+\frac{1}{(2n-1)\times 2n}}{\frac{1}{(n+1)\times 2n}+\frac{1}{(n+2)\times (2n-1)}+...+\frac{1}{(n+n)\times (2n-(n-1))}}=\frac{3n+1}{2}$$

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