Can anyone solve this question for me? Thank you very much A 3 × 7 rectangle is divided into 21 squares each of which is colored red or black. Prove that the board contains a nontrivial rectangle (not 1 × k or k × 1) whose four corner squares are all black or all red.

Can anyone solve this question for me? Thank you very much A 3 × 7 rectangle is divided into 21 squares each of which is colored red or black. Prove that the board contains a nontrivial rectangle (not 1 × k or k × 1) whose four corner squares are all black or all red.

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter4: Polynomial And Rational Functions

Section4.3: Zeros Of Polynomials

Problem 56E

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Question

Can anyone solve this question for me?

Thank you very much

A 3 × 7 rectangle is divided into 21 squares each of which is colored red or black. Prove that the board contains a nontrivial rectangle (not 1 × k or k × 1) whose four corner squares are all black or all red.