PUMaC 2007 · 代数（A 组） · 第 3 题

PUMaC 2007 — Algebra (Division A) — Problem 3

For how many rational numbers p is the area of the triangle formed by the intercepts and vertex of 2 f ( x ) = − x + 4 px − p + 1 an integer? 6 5 4 3 2

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