[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 122: include(/home/shoeb/public_html/www.matholympiad.org.bd/forum/includes/phpbb-latex.php) [function.include]: failed to open stream: No such file or directory
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 122: include() [function.include]: Failed opening '/home/shoeb/public_html/www.matholympiad.org.bd/forum/includes/phpbb-latex.php' for inclusion (include_path='.:/opt/php53/lib/php')
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 122: include(/home/shoeb/public_html/www.matholympiad.org.bd/forum/includes/phpbb-latex.php) [function.include]: failed to open stream: No such file or directory
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 122: include() [function.include]: Failed opening '/home/shoeb/public_html/www.matholympiad.org.bd/forum/includes/phpbb-latex.php' for inclusion (include_path='.:/opt/php53/lib/php')
[phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4786: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887)
[phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4788: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887)
[phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4789: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887)
[phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4790: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887)
BdMO Online Forum • Search

Search found 97 matches

Return to advanced search

Re: BDMO Forum Mafia #2

10 minutes left. :(
by Thamim Zahin
Tue Apr 25, 2017 7:50 pm
 
Forum: Social Lounge
Topic: BDMO Forum Mafia #2
Replies: 27
Views: 723

Re: BDMO Forum Mafia #2

I have a plan: First everyone will vote themselves, so gonju(or me) will die. And from the next day, we(or just you) will continue as @thanicsamin said. Who will not do as you guys said will be killed.
by Thamim Zahin
Mon Apr 24, 2017 12:11 am
 
Forum: Social Lounge
Topic: BDMO Forum Mafia #2
Replies: 27
Views: 723

Re: USA(J)MO 2017 #3

joydip wrote:
Proof: Let the tangent to $(ABC)$ at $A$ meet $BP$ at $J$ .Then applying pascal's theorem on hexagon $AACPBB$ we get $JF \parallel BB \parallel AC$ . So



How did you get that idea?
by Thamim Zahin
Sat Apr 22, 2017 9:31 pm
 
Forum: Geometry
Topic: USA(J)MO 2017 #3
Replies: 6
Views: 204

USAMO 2017/4, USA(J)MO 2017/6

Let $P_1$, $P_2$, $\dots$, $P_{2n}$ be $2n$ distinct points on the unit circle $x^2+y^2=1$, other than $(1,0)$. Each point is colored either red or blue, with exactly $n$ red points and $n$ blue points. Let $R_1$, $R_2$, $\dots$, $R_n$ be any ordering of the red points. Let $B_1$ be the nearest blue...
by Thamim Zahin
Sat Apr 22, 2017 6:17 pm
 
Forum: Combinatorics
Topic: USAMO 2017/4, USA(J)MO 2017/6
Replies: 0
Views: 93

Re: USA TST 2011/1

Let the lines $\overleftrightarrow{FE}$ and $\overleftrightarrow{BC}$ intersect at $M$. and let the segment $\overline{FE}$ and $\overline{AD}$ intersect at $N$. And let take $\overleftrightarrow{AP}$ and $\overleftrightarrow{QR}$ meet at $P_{\infty}$. Now we know that $(M,D;B,C)$ is harmonic. Take ...
by Thamim Zahin
Fri Apr 21, 2017 1:37 am
 
Forum: Geometry
Topic: USA TST 2011/1
Replies: 3
Views: 137

Re: BDMO Forum Mafia #2

This is actually a good idea. I am not voting myself because I am gonju(I don't have any proof but trust me)
by Thamim Zahin
Fri Apr 21, 2017 12:49 am
 
Forum: Social Lounge
Topic: BDMO Forum Mafia #2
Replies: 27
Views: 723

When everyone is busy solving USA(J)MO 2017,I am solving2016

The isosceles triangle $\triangle ABC$, with $AB=AC$, is inscribed in the circle $\omega$. Let $P$ be a variable point on the arc $\stackrel{\frown}{BC}$ that does not contain $A$, and let $I_B$ and $I_C$ denote the incenters of triangles $\triangle ABP$ and $\triangle ACP$, respectively. Prove that...
by Thamim Zahin
Thu Apr 20, 2017 11:47 pm
 
Forum: Geometry
Topic: When everyone is busy solving USA(J)MO 2017,I am solving2016
Replies: 1
Views: 90

Re: Beginner's Marathon

$\text{Problem 16}$ There are $n$ ants on a stick of length one unit, each facing left or right. At time $t = 0$, each ant starts moving with a speed of $1$ unit per second in the direction it is facing. If an ant reaches the end of the stick, it falls off and doesn’t reappear. When two ants moving ...
by Thamim Zahin
Tue Apr 18, 2017 11:45 pm
 
Forum: Junior Level
Topic: Beginner's Marathon
Replies: 48
Views: 1594

Re: Beginner's Marathon

aritra barua wrote:Let us denote by $ABC$,the area of $\bigtriangleup ABC$


Use $[ABC]$ to denote the area of $\triangle ABC$. It is more natural and used frequently.
by Thamim Zahin
Tue Apr 18, 2017 8:36 pm
 
Forum: Junior Level
Topic: Beginner's Marathon
Replies: 48
Views: 1594

Re: Beginner's Marathon

The numbers of irreducible fractions is even. For example: if $n=6$,

$\frac{1}{6},\frac{2}{6},\frac{3}{6},\frac{4}{6},\frac{5}{6}$. Here, $\frac{1}{6}$ and $\frac{5}{6}$ is irreducible and there number is tow, in fact even.
by Thamim Zahin
Tue Apr 18, 2017 8:28 pm
 
Forum: Junior Level
Topic: Beginner's Marathon
Replies: 48
Views: 1594
Next

Return to advanced search

cron