UPJOKE
differencedeviationvariationvariablederivativederived functionfirst derivativecomputationdiscrepancydisparitydifferentiationcalculationcalculusdivergenceinequality

I failed Calculus when we reached differentials...

I guess I should have known my limits. I could barely derive anything from what the teacher taught us.

One professor of mathematics noticed that his kitchen sink at his home broke down.

He called a plumber. The plumber came on the next day, sealed a few screws and everything was working as before.

The professor was delighted. However, when the plumber gave him the bill a minute later, he was shocked.

"This is one third of my monthly salary !" he yelled.

Well, a...

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