1. ## Quick limit question

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 $-\infty \to 0$?

2. 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 $-\infty \to 0$?

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!)
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!)