Comment by tverbeure

I remember a homework where I had to graph some function. I decided use the plotting function of Lotus 1-2-3 for that. The plot worked fine, but didn’t make sense.

I then spent way more time than what I would have spent without the plotter to figure out that a pole and a zero were located right next to eachother.

I had no idea if the teacher had done that on purpose, but it made enough of an impression on me that I still remember it.

The point of math exercises is usually not to get to solution as quickly as possible.