The default spacing of the array environment puts fractions in the same column too close together (vertically) for my liking. This is my code:
Code: Select all
\documentclass[12pt]{article}
\begin{document}
\[
\left(\begin{array}{ccc|c}
1&2&-1&-1\\
0&1&\frac{3}{2}&\frac{9}{2}\\
0&0&\frac{11}{2}&\frac{55}{2}
\end{array}\right)
\]
\end{document}
Thanks,
Tony