Well, I am bored.

So, I would like to start a challenge party just like I have previously done before for calculus. This time, it's based on Binomial Coefficient.

You can also post the challenges if you like which should mostly be based on proof writing. If there is no solution for a week, the challenge writer must give its solution.

Have fun!

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Easy Math Editor

`*italics*`

or`_italics_`

italics`**bold**`

or`__bold__`

boldNote: you must add a full line of space before and after lists for them to show up correctlyparagraph 1

paragraph 2

`[example link](https://brilliant.org)`

`> This is a quote`

Remember to wrap math in \( ... \) or \[ ... \] to ensure proper formatting.`2 \times 3`

`2^{34}`

`a_{i-1}`

`\frac{2}{3}`

`\sqrt{2}`

`\sum_{i=1}^3`

`\sin \theta`

`\boxed{123}`

## Comments

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TopNewestHere is the first challenge.

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I'd like to propose a problem. I have posted it here. There exists a very elegant solution.

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@Mark Hennings, @Ishan Singh

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1, 2, 3.

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