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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?

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# Absolute value of infinity

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