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.

You guys are on your own :) this is way over my head. But let me know if you think the difficulty rating of 4 is off the mark on this one.

Posted by levik on 2002-07-31 01:45:38