Quick limit question

**craig** · April 1st 2010, 05:05 AM

In a lot of questions there is, $\lim_{x \to 0^{+}}$ .

I know this means as $x$ tends towards zero positive, but I can't remember whether this means $x$ is going from $+\infty \to 0$ or from $-\infty \to 0$ ?

Thanks in advance.

**Deadstar** · April 1st 2010, 05:23 AM

Originally Posted by craig

In a lot of questions there is, $\lim_{x \to 0^{+}}$ .

I know this means as $x$ tends towards zero positive, but I can't remember whether this means $x$ is going from $+\infty \to 0$ or from $-\infty \to 0$ ?

Thanks in advance.

It's the first one. As x appoaches 'from the right'. I suppose that doesn't actually mean from $+\infty$ rather just from somewhere at the right of $x$ (after all they may be asymptotes and what not to the right of $x$ so if we approached from $+\infty$ we would hit those first!)

**craig** · April 1st 2010, 05:28 AM

Originally Posted by Deadstar

It's the first one. As x appoaches 'from the right'. I suppose that doesn't actually mean from $+\infty$ rather just from somewhere at the right of $x$ (after all they may be asymptotes and what not to the right of $x$ so if we approached from $+\infty$ we would hit those first!)

Thankyou

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