User contributions
- 10:02, 18 June 2009 (diff | hist) . . (+2) . . 2009 USAMO Problems/Problem 4 (→Solution)
- 09:55, 12 June 2009 (diff | hist) . . (+924) . . 2009 USAMO Problems/Problem 4 (→Problem)
- 09:39, 12 June 2009 (diff | hist) . . (+378) . . N 2009 USAMO Problems/Problem 4 (New page: == Problem == For <math>n \ge 2</math> let <math>a_1</math>, <math>a_2</math>, ..., <math>a_n</math> be positive real numbers such that <cmath> (a_1+a_2+ ... +a_n)\big( {1 \over a_1} + {1...)
