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Omni-MATH / Find all functions f: mathbbQ^plus mapsto mathbbQ^plus such that: f(x) plus f(y) plus 2xy f(xy) equal frac f(xy)f(xplusy). · Discussion

Discussing Find all functions f: mathbb{Q}^{plus{}} mapsto mathbb{Q}^{plus{}} such that: f(x) plus{} f(y) plus{} 2xy f(xy) equal{} frac {f(xy)}{f(xplus{}y)}. · Omni-MATH

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