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MathNet 2008-part-04 — 165 problems (EN–VI) Question 101

Math Olympiad Vault · MathNet 2008-part-04 — 165 problems (EN–VI)

Question 101

Let $ABC$ be a given triangle. Let $D$ be a point on $[BC]$ such that $|AD| = \frac{|BD|^2}{|AB| + |AD|} = \frac{|CD|^2}{|AC| + |AD|}$ and $E$ be a point such that $D \in [AE]$ and $|CD| = \frac{|DE|^2}{|CD| + |CE|}$. Prove that $|AE| = |AB| + |AC|$. (Ali Doğanaksoy).