Here's a difficult problem of proving that a given expression is not a perfect square. A direct approach will be a nightmare ( even not sure it can be proved) but use of a simple property of perfect squares will ease the problem. We know that any perfect squares leaves a remainder either 1 or 0 when being divided by 3 or 4. This simple result would be used to solve the problem.
Solved Problems: Indian Statistical Institute (ISI), Chennai Mathematical Institute (CMI), IIT-JEE Main & Advance, and Olympiads (RMO/INMO). Entrance Exam Solutions: Solved Problems for ISI B.Math/B.Stat, CMI, JEE (IIT), Olympiads, and CBSE/ISC/ICSE Mathematics Board Papers. Practice Problems and Chapter Test on various topics for CBSE, ICSE, Madhyamik, HS and ISC students
Showing posts with label perfect squares. Show all posts
Showing posts with label perfect squares. Show all posts
Wednesday, October 23, 2019
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