Search found 188 matches

by sakibtanvir
Sun Jan 15, 2012 7:11 pm
Forum: Junior Level
Topic: junior combinatorics
Replies: 4
Views: 1621

Re: junior combinatorics

I got it :D :D :D
by sakibtanvir
Sun Jan 15, 2012 10:19 am
Forum: Geometry
Topic: A little help.....
Replies: 6
Views: 1796

Re: A little help.....

:lol: :lol: :lol:
by sakibtanvir
Sat Jan 14, 2012 6:29 pm
Forum: Junior Level
Topic: Prooove it!
Replies: 6
Views: 1702

Re: Prooove it!

WLOG let us assume $c\leq b\leq a$ let $x= \frac {1}{a},y=\frac {1}{b},z=\frac {1}{c}$ now, now, we can find the left hand side, \[\frac{x^{3}}{\frac{1}{y}+\frac{1}{z}}+\frac{y^{3}}{\frac{1}{x}+\frac{1}{z}}+\frac{z^{3}}{\frac{1}{x}+\frac{1}{y}}\] \[=\frac{x^{2}}{y+z}+\frac{y^{2}}{x+z}+\frac{z^{2}}{...
by sakibtanvir
Fri Jan 13, 2012 11:04 pm
Forum: Junior Level
Topic: Crazy statements
Replies: 4
Views: 1280

Re: Crazy statements

u r r8....................
by sakibtanvir
Fri Jan 13, 2012 10:47 pm
Forum: Junior Level
Topic: Prooove it!
Replies: 6
Views: 1702

Prooove it!

a,b,c are positive real numbers.\[abc=1\]Prove that,\[\frac{1}{a^3(b+c)}+\frac{1}{b^3(c+a)}+\frac{1}{c^3(a+b)}\geq \frac{3}{2}\]
by sakibtanvir
Fri Jan 13, 2012 1:00 pm
Forum: Junior Level
Topic: Crazy statements
Replies: 4
Views: 1280

Crazy statements

Teacher wrote a number on board.A student told the number is divisible by 31.Then another student told it is divisible by 30,the next student told it is also divisible by 29...thus the last student told the number is divisible by 2.Then Teacher said,"Of all this statement two consecutive statements ...
by sakibtanvir
Thu Jan 12, 2012 11:29 pm
Forum: Junior Level
Topic: Friendly Triangles[self-made]
Replies: 4
Views: 1832

Re: Friendly Triangles[self-made]

I think it will be 30 as well...........(Really they r friendly :D)
by sakibtanvir
Thu Jan 12, 2012 8:29 pm
Forum: News / Announcements
Topic: Prothom Alo 4/1/2012 page 6 column 5
Replies: 13
Views: 5179

Re: Prothom Alo 4/1/2012 page 6 column 5

:lol: The problem and the article is a funny joke...... :lol: :lol: :lol: :lol: