To "therell 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 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 youll see
That what the limit gives us, if our work all checks,
Is what we call dy/dx,
Its just dy/dx.
