2 Opera/9.80 (X11; Linux i686) Presto/2.12.388 Version/12.16 /rde/contents/library/ps2img/cgi-bin/eqn2gif.cgi 157.118.205.34 1408261147 2014/08/17 16:39: 7 && \frac{1}{1\cdot 5}+\frac{1}{3\cdot 7}+\frac{1}{5\cdot 9}+\cdots+\frac{1}{37\cdot 41} \\ &=& \sum_{k=1}^{19} \frac{1}{(2k-1)(2k+3)} = \sum_{k=1}^{19} \frac{1}{4} \left( \frac{1}{2k-1}-\frac{1}{2k+3} \right) \\ &=& \frac{1}{4} \left( \sum_{k=1}^{19} \frac{1}{2k-1}-\sum_{k=1}^{19} \frac{1}{2k+3} \right) = \frac{1}{4} \left( \sum_{k=1}^{19} \frac{1}{2k-1}-\sum_{k=3}^{21} \frac{1}{2k-1} \right) \\ 使えるLaTeXコマンド一覧 14 変換(アンチエイリアス) <IMG SRC="../cgi-cache/20140817_162447.gif"> 変換 正常に処理されました 20140817_162447 http://www.mech.tohoku-gakuin.ac.jp/rde/contents/library/ps2img/eqn2gif_online.html Sun Aug 17 16:39:07 2014