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#### Petrus

##### Well-known member

- Feb 21, 2013

- 739

I got one question, I am currently working with an old exam and I am suposed to draw it with vertican/horizontal lines (and those that are oblique).

\(\displaystyle f(x)=\frac{x}{2}+\tan^{-1}(\frac{1}{x})\)

for the horizontel line

\(\displaystyle \lim_{x->\infty^{\pm}}\frac{x}{2}+\tan^{-1}(\frac{x}{2})\)

Is it enough just to see that \(\displaystyle \lim_{x->\infty^{\pm}}\frac{x}{2} = \pm \infty\) and say there is no horizontel line?

So I have to check oblique line

Regards,

\(\displaystyle |\pi\rangle\)