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TR-MO-R1 2016 Problem 19

    Gerçel katsayılı bir PP polinomu P(1)=1P(1) = 1 ve her x,yx, y gerçel sayıları için P(x)+P(y)=P(x+y)−2xy+1P(x) + P(y) = P(x + y) - 2xy + 1 koşullarını sağlıyor. Buna göre P(x)P(x) in alabileceği en küçük değer nedir?

    a) 14\dfrac{1}{4} b) 13\dfrac{1}{3} c) 12\dfrac{1}{2} d) 23\dfrac{2}{3} e) 34\dfrac{3}{4}

    Official text Turkish Mathematical Olympiad, first round 2016 official paper, page 7. Quoted with source.

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