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TR-MO-R1 2021 Problem 5

    Çeşitkenar bir ABCABC üçgeninin [BC][BC] kenarı üstünde ∣BD∣=∣EC∣<∣BE∣|BD| = |EC| < |BE| olacak şekilde DD ve EE noktaları alınıyor. ∣AB∣=3∣AD∣+∣AE∣|AB| = 3|AD| + |AE| ve ∣AC∣=∣AD∣+3∣AE∣|AC| = |AD| + 3|AE| ise, ∣BC∣∣DE∣\dfrac{|BC|}{|DE|} kaçtır?

    a) 5 b) 6 c) 7 d) 8 e) Hiçbiri

    Official text Turkish Mathematical Olympiad, first round 2021 official paper, page 4. Quoted with source.

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