Tom Lehrer The Derivative Song Lyrics:
To "There'll be Some Changes Made".

You take a function of x and you call it y, Take
any x-nought that you care to try, You make a
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little change and call it delta x, The
corresponding change in y is what you find nex',
And then you take the quotient and now carefully
Send delta x to zero, and I think you'll see That
what the limit gives us, if our work all checks,
Is what we call dy/dx, It's just dy/dx.
Lyrics: The Derivative Song, Tom Lehrer [end]