5 Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; rv:11.0) like Gecko /rde/contents/library/ps2img/cgi-bin/eqn2gif.cgi 157.118.206.41 1568005815 2019/09/09 14:10:15 \begin{array}{cl} _6 {\rm C}_2 \times _4 {\rm C}_2 &=\frac{_6 {\rm P}_2}{2!} \times \frac{_4 {\rm P}_2}{2!}\\ &=\frac{6 \cdot 5}{2 \cdot 1} \cdot \frac{4 \cdot 3}{2 \cdot 1}\\ &=15 \cdot 6 &=90 \end{array} 4 変換(アンチエイリアス) [画像は表示できません] エラーがありました ! Extra alignment tab has been changed to \cr. <recently read> \endtemplate l.22 & =90% ? ! Emergency stop. <recently read> \endtemplate l.22 & =90% 20190909_140641 Mon Sep 9 14:10:15 2019