1 | initial version |

I am not sure about your problem, but if you want to see the vertical asymptote around zero, you can require Sage to plot more points as follows:

```
f(x) = x^2 + 1/x
plot(f, (x, -100, 100), plot_points=100000)
```

See http://sagecell.sagemath.org/?z=eJxL06jQVLBVqIgzUtBWMNSv4OUqyMkv0UjTUdCo0FHQNTQw0FEAEpo6CiDx-IL8zLySYlugCBBoAgDfUQ_m&lang=sage

2 | No.2 Revision |

I am not sure about your ~~problem, ~~problem (you did not tell what was wrong in the picture), but ~~if ~~in case you want to see the vertical asymptote around zero, you can require Sage to plot more points as follows:

```
f(x) = x^2 + 1/x
plot(f, (x, -100, 100), plot_points=100000)
```

See http://sagecell.sagemath.org/?z=eJxL06jQVLBVqIgzUtBWMNSv4OUqyMkv0UjTUdCo0FHQNTQw0FEAEpo6CiDx-IL8zLySYlugCBBoAgDfUQ_m&lang=sage

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