I'm using enumerate
to type up homework solutions, based on the following MWE. When I remove the [(a)]
from the enumerate
, there isn't an error, but when I add it, I get the "perhaps a missing \item
" error. How can I fix this? I don't want to add an \item
in front of the solution, since it isn't part of the list per se, and I don't want to remove the custom bullet because in my full document, this is part of a nested list.
\documentclass[12pt]{article}
\begin{document}
\begin{enumerate}[(a)]
\item $n(n+1)/2 \in O(n^3)$
True, because $n(n+1)/2$ is of order 2, which is less than order 3.
\item $n(n+1)/2 \in O(n^2)$
\end{enumerate}
\end{document}
Best Answer
You need to include the
enumerate
package, since it redefines theenumerate
environment to manage an optional argument:A similar format would have been achieved with the
enumitem
package: