Back to Basics - What actually is differentiation?
First post so be gentle with me :)
OK. What actually is differentiation?
Here's the reason I'm asking this.
Is it working out the gradient of the tangent of a curve as per my understanding?
If so, what does it mean to have a tangent (dy/dx solution) which is a quadratic or a polynomial rather than a straight line?
Also, what is the second derivative actually telling you?
What about third derivates and beyond?
Any answers to these would be gratefully received.:)