Hi,(adsbygoogle = window.adsbygoogle || []).push({});

I came across a book which looks at a problem like

[tex]\lim_{x \to 0}\frac{1}{x}[/tex]

So you approach from 0-, and get -∞, approach from 0+, get ∞

Then it would write the answer as

[tex]\lim_{x \to 0}\frac{1}{x} = \left| \infty \right|[/tex]

It looks bizarre to me. How do you parse this? Is this common practice or just bad notation?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Absolute value of infinity

**Physics Forums | Science Articles, Homework Help, Discussion**