Hello,

find all $\displaystyle (a,b)$ with $\displaystyle a,b \in \mathbb{N}^{*} $such that :$\displaystyle \displaystyle \frac {a}{b} + \frac {{21b}}{{25a}} \in\mathbb{N}$

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- Apr 27th 2009, 11:36 AMmaria18find (a,b)
Hello,

find all $\displaystyle (a,b)$ with $\displaystyle a,b \in \mathbb{N}^{*} $such that :$\displaystyle \displaystyle \frac {a}{b} + \frac {{21b}}{{25a}} \in\mathbb{N}$ - Apr 27th 2009, 12:18 PMOpalg
- Apr 28th 2009, 07:30 AMmaria18
- Apr 28th 2009, 07:41 AMHallsofIvy
Maria18, how is your solution different from Opalg's?