Here's one of the jokes that I find hilarious at this point because of a number of things.
[Joke published with permission from "Author/Sharer"]
There was a party where all the math functions are present.
There's f(x) = x, f(x) = x^2, f(x) = cos(x), and a lot others.
|Photo from: http://www.scilab.org/product/man/Mathoperations_pal.htm|
Suddenly f(x) = sqrt(x) shouted in panic: THE DERIVATIVES ARE COMING! THE DERIVATIVES ARE COMING!
Pandemonium reigned. Everyone in the party ran for their lives, ALL EXCEPT f(x) = e^x.
A fellow function asked him: aren't you going to run and hide?
e^x replied "I AM e^x, d/dx WILL NEVER CHANGE ME."
|Photo from: http://www.regentsprep.org/Regents/math/algtrig/ATP8b/exponentialFunction.htm|
And so e^x was left in the middle of the hall, undeterred, minding his own thing.
THEN THE DERIVATIVES CAME.
d/dy was among them.
e^x said, "OH CRAP"
Okay, now is the time to laugh. -(",)-*wink*