## Dhaka Secondary 2011/4

Problem for Secondary Group from Divisional Mathematical Olympiad will be solved here.
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Please don't post problems (by starting a topic) in the "Secondary: Solved" forum. This forum is only for showcasing the problems for the convenience of the users. You can post the problems in the main Divisional Math Olympiad forum. Later we shall move that topic with proper formatting, and post in the resource section.
BdMO
Posts: 134
Joined: Tue Jan 18, 2011 1:31 pm

### Dhaka Secondary 2011/4

\begin{align*}a + b + c + d + e =& 1\\ a - 2b + c -2d + e =& 2\\ a + b -3c + d -3e =& 3\\ -4a + b + c - 4d + e =& 4\\ a -5b + c + d - 5e =& 5\end{align*}
উপরের সমীকরণগুলো থেকে $a$ এর মান বের কর।
Find $a$ from the above set of equations.

*Mahi*
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### Re: Dhaka Secondary 2011/4

Please read Forum Guide and Rules before you post.

Use $L^AT_EX$, It makes our work a lot easier!

Nur Muhammad Shafiullah | Mahi

Avik Roy
Posts: 156
Joined: Tue Dec 07, 2010 2:07 am

### Re: Dhaka Secondary 2011/4

good solution Mahi,
even I needed some bigger (but not so bigger) steps to solve it
"Je le vois, mais je ne le crois pas!" - Georg Ferdinand Ludwig Philipp Cantor