a nice but little tricky inequality (math olympiad problem)
Channel: WISE
Date: 2021-02-01

This is a math olympiad inequality problem I found in a training for Math Olympiad teachers, in which I did the grading for the test.  If anyone found where did this math olympiad problem appear, please let me know: the contest, or book, etc.

This inequality is quite tricky, but once you find a way, the proof is actually simple and quite short. A crucial step is the simple algebraic manipulation. Then using Cauchy Schwarz or could also Rearrangement in the middle of proof.

I make videos about math olympiad or contest mathematics problems, but not limited to it I also make videos on calculus, pure, and applied mathematics.