## Why does x^0 equal 1?

Since basic school we know, that $x^0=1$, but only recently when our kids began to study mathematics we asked ourselves “why?”.

I came up with this explanation:

$x^0=x^{n-n}=x^n \times x^{-n}=\frac {x^n} {x^n}=1$

Also a good test for the Easy LaTeX WordPress plug-in.

And here’s jsxgraph plug-in test:
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## External searching in mybb

Sometimes you need to integrate web-pages with corresponding forum threads. Here’s one of the ways to do it.

<?php
$keywords=”MyBB integration”; // The search keywords ?> <!– The path to mybb search.php –> <form method=”post” action=”http://www.yoursite.com/mybb/search.php”> <input type=”hidden” name=”action” value=”do_search” /> <input type=”hidden” name=”keywords” value=”<?php echo$keywords; ?>” />
<!– search titles only –>