Limit appearing to the right of the limit sign in LaTeX

Question

Why doesn't the u->infinity appear under the limit when I compile? Instead it is appearing to the right of the limit. How do I correct this?

\frac{1}{\lim_{u \rightarrow \infty}}

Answer 1

You need to use \displaystyle:

Try this:

\[\frac{1}{\displaystyle \lim_{u \rightarrow \infty}}\]

Answer 2

\frac{1}{\lim\limits_{u \rightarrow \infty}}