olymmath

Putnam 1988 A1

  • Session A

Let RR be the region consisting of the points (x,y)(x,y) of the cartesian plane satisfying both ∣x∣−∣y∣≤1|x|-|y| \leq 1 and ∣y∣≤1|y| \leq 1. Sketch the region RR and find its area.

Curated text Kedlaya Putnam archive. Quoted with source.

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