User contributions
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- 23:15, 16 December 2018 (diff | hist) . . (+1) . . 2004 JBMO Problems/Problem 1 (→Solution)
- 23:14, 16 December 2018 (diff | hist) . . (-5) . . 2004 JBMO Problems/Problem 1
- 23:07, 16 December 2018 (diff | hist) . . (+796) . . N 2004 JBMO Problems/Problem 1 (Created page with "==Problem== Prove that the inequality <cmath> \frac{ x+y}{x^2-xy+y^2 } \leq \frac{ 2\sqrt 2 }{\sqrt{ x^2 +y^2 } } </cmath> holds for all real numbers <math>x</math> and <math...")
- 21:53, 13 December 2018 (diff | hist) . . (-1) . . 2003 JBMO Problems/Problem 3 (current)
- 21:49, 13 December 2018 (diff | hist) . . (-4) . . 2003 JBMO Problems/Problem 3
- 00:00, 13 December 2018 (diff | hist) . . (0) . . 2003 JBMO Problems/Problem 3 (→Solution)
- 22:30, 12 December 2018 (diff | hist) . . (-1) . . 2003 JBMO Problems/Problem 3 (→Solution)
- 15:36, 12 December 2018 (diff | hist) . . (+22) . . 2003 JBMO Problems/Problem 3
- 15:35, 12 December 2018 (diff | hist) . . (+4,240) . . N 2003 JBMO Problems/Problem 3 (Created page with "==Problem== Let <math>D</math>, <math>E</math>, <math>F</math> be the midpoints of the arcs <math>BC</math>, <math>CA</math>, <math>AB</math> on the circumcircle of a triangl...")
- 15:38, 9 December 2018 (diff | hist) . . (+2,573) . . N 2002 JBMO Problems/Problem 2 (Created page with "==Problem== Two circles with centers <math>O_{1}</math> and <math>O_{2}</math> meet at two points <math>A</math> and <math>B</math> such that the centers of the circles are o...") (current)
- 20:37, 8 December 2018 (diff | hist) . . (+1,365) . . N 2002 JBMO Problems/Problem 1 (Created page with "==Problem== The triangle <math>ABC</math> has <math>CA = CB</math>. <math>P</math> is a point on the circumcircle between <math>A</math> and <math>B</math> (and on the opposi...")
- 17:37, 8 December 2018 (diff | hist) . . (+3,130) . . N 2001 JBMO Problems/Problem 3 (Created page with "==Problem 3== Let <math>ABC</math> be an equilateral triangle and <math>D,E</math> on the sides <math>[AB]</math> and <math>[AC]</math> respectively. If <math>DF,EG</math> (...")
- 17:09, 8 December 2018 (diff | hist) . . (-255) . . 2001 JBMO Problems (→Problem 3) (current)
- 16:37, 8 December 2018 (diff | hist) . . (+358) . . 2001 JBMO Problems (→Problem 3)
- 23:53, 4 December 2018 (diff | hist) . . (+21) . . 1990 AIME Problems/Problem 11
- 23:41, 4 December 2018 (diff | hist) . . (0) . . N File:Problem 3 Pic.jpg (current)
- 23:35, 4 December 2018 (diff | hist) . . (+136) . . 2000 JBMO Problems/Problem 3
- 23:21, 4 December 2018 (diff | hist) . . (-1) . . 2000 JBMO Problems/Problem 3
- 23:09, 4 December 2018 (diff | hist) . . (+2,060) . . N 2000 JBMO Problems/Problem 3 (Created page with "==Problem 3== A half-circle of diameter <math>EF</math> is placed on the side <math>BC</math> of a triangle <math>ABC</math> and it is tangent to the sides <math>AB</math> an...")
- 23:25, 3 December 2018 (diff | hist) . . (+125) . . 2000 JBMO Problems/Problem 2 (→Solution)
- 23:24, 3 December 2018 (diff | hist) . . (0) . . 2000 JBMO Problems/Problem 1
- 23:20, 3 December 2018 (diff | hist) . . (+580) . . 1999 JBMO Problems/Problem 4
- 23:18, 3 December 2018 (diff | hist) . . (+216) . . 1998 JBMO Problems/Problem 2
- 23:12, 3 December 2018 (diff | hist) . . (+826) . . N 2000 JBMO Problems/Problem 2 (Created page with "== Solution == After rearranging we get: <math>(k-n)(k+n) = 3^n</math> Let <math>k-n = 3^a, k+n = 3^{n-a}</math> we get: <math>2n = 3^a(3^{n-2a} - 1)</math> or, <math>(2n/(...")
- 20:58, 3 December 2018 (diff | hist) . . (+510) . . 2000 JBMO Problems/Problem 1 (→Solution)
- 17:00, 2 December 2018 (diff | hist) . . (+1,152) . . N 1999 JBMO Problems/Problem 4 (Created page with "Its easy to see that <math>B'</math>, <math>C'</math>, <math>D</math> are collinear (since angle <math>B'DB</math> = <math>C'DC</math> = <math>90^o</math>). Applying Sine ru...")
- 00:20, 29 November 2018 (diff | hist) . . (+15) . . 1998 JBMO Problems/Problem 2
- 00:19, 29 November 2018 (diff | hist) . . (+11) . . 1998 JBMO Problems/Problem 2
- 00:18, 29 November 2018 (diff | hist) . . (+1,376) . . N 1998 JBMO Problems/Problem 2 (Created page with "Let <math>BC = a, ED = 1 - a</math> Let angle <math>DAC</math> = <math>X</math> Applying cosine rule to triangle <math>DAC</math> we get: <math>Cos X = (AC ^ {2} + AD ^ {2}...")
- 17:14, 16 May 2015 (diff | hist) . . (-13) . . 2011 AIME II Problems/Problem 13 (→Solution 5)
- 17:11, 16 May 2015 (diff | hist) . . (+95) . . 2011 AIME II Problems/Problem 13 (→Solution 5)
- 17:08, 16 May 2015 (diff | hist) . . (+371) . . 2011 AIME II Problems/Problem 13 (→Solution 5)
- 16:54, 16 May 2015 (diff | hist) . . (+94) . . 2011 AIME II Problems/Problem 13 (→Solution 5)
- 16:45, 16 May 2015 (diff | hist) . . (+15) . . 2011 AIME II Problems/Problem 13 (→Solution 5)
- 16:43, 16 May 2015 (diff | hist) . . (+13) . . 2011 AIME II Problems/Problem 13 (→Solution 4)
- 16:31, 16 May 2015 (diff | hist) . . (+497) . . 2011 AIME II Problems/Problem 13 (→Solution 4)
- 22:07, 17 November 2014 (diff | hist) . . (+1,648) . . 2013 AIME II Problems/Problem 15 (→Solutions)
- 22:10, 16 November 2014 (diff | hist) . . (+8) . . 1992 AIME Problems/Problem 8 (→Solution 3)
- 22:09, 16 November 2014 (diff | hist) . . (+8) . . 1990 AIME Problems/Problem 11 (→Generalization:)
- 22:09, 16 November 2014 (diff | hist) . . (+8) . . 1990 AIME Problems/Problem 11 (→Solution 2)
- 22:08, 16 November 2014 (diff | hist) . . (+9) . . 2013 AIME II Problems/Problem 14 (→Generalized Solution)
- 21:55, 16 November 2014 (diff | hist) . . (+894) . . 2013 AIME II Problems/Problem 14 (→Solution)
- 12:39, 21 October 2010 (diff | hist) . . (+13) . . 1994 AIME Problems/Problem 14 (→Solution 2)
- 12:38, 21 October 2010 (diff | hist) . . (+572) . . 1994 AIME Problems/Problem 14 (→Solution)
- 14:15, 10 December 2009 (diff | hist) . . (+722) . . 1992 AIME Problems/Problem 8 (→Alternate Solution)
- 21:40, 28 October 2009 (diff | hist) . . (+6) . . m 1990 AIME Problems/Problem 11 (→Generalization:)
- 21:40, 28 October 2009 (diff | hist) . . (+6) . . m 1990 AIME Problems/Problem 11 (→Generalization:)
- 21:39, 28 October 2009 (diff | hist) . . (+5) . . m 1990 AIME Problems/Problem 11 (→Solution 2)
- 21:38, 28 October 2009 (diff | hist) . . (-2) . . m 1990 AIME Problems/Problem 11 (→Generalization:)
- 21:38, 28 October 2009 (diff | hist) . . (+1,334) . . m 1990 AIME Problems/Problem 11
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