Define:
d/dx(f(x)) = f'(x)

where f'(x) = gradient (or slope) of f(x) at x = x.

Prove that:
d/dx(x^2) = 2x

without using calculus.

I came up with this in 10th grade, when we were beginning to learn calculus basics. That may give
you an idea of the sort of math employed..

Posted by Cheradenine on 2002-07-31 22:21:18