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KöMaL 2025 B5435

    The incircle of triangle ABCABC is tangent to the sides BCBC, CACA, ABAB at DD, EE, FF, respectively. Let PP be the point on the segment ADAD for which 2⋅AP=PD2\cdot AP=PD, and define points QQ, RR on the segments BEBE and CFCF, respectively in a similar manner. Show that at least one of the points PP, QQ, RR lies on or inside the incircle.

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