Difference between revisions of "1989 APMO Problems/Problem 1"
(Created page with "==Problem== Let <math>x_1</math>, <math>x_2</math>, <math>\cdots</math>, <math>x_n</math> be positive real numbers, and let <cmath> S = x_1 + x_2 + \cdots + x_n. </cmath> Pro...") |
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Latest revision as of 20:54, 11 July 2021
Problem
Let ,
,
,
be positive real numbers, and let
Prove that