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%                                               
%            Shizuoka University 
%       ----KANEKO & YAMASHITA LAB.----
%        Author: TSUCHIYA, Toru
%     File Name: rensyu13.tex
% Last Modified: Wed, 06 Jun 2007 16:14:17 +0900
%                                               
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\documentclass[a4j]{jarticle}
\usepackage{amsmath}
\begin{document}

\[
 \text{���$[a, b]$�ɂ�����Ȑ�$y = f(x)$�̒���}= \int_a^b\sqrt{1 + \frac{dy}{sx}^2}dx
\]

\[
 \int_0^1(1-x^2)dx = \frac{(2n)!!}{(2n + 1)!!}\ \ \ 
 \int_0^{\frac{\pi}{2}}\sin^\alpha dx = 
 \frac{\sqrt{\pi}}{2} {\mit\Gamma}\left(\frac{\alpha + 
 1}{2}\right)\Big/ {\mit\Gamma}\left(\frac{\alpha + 2}{2}\right)
 \]
\end{document}

