Recent content by Tim_B

Good point. I should redefine my terms.

Could you give an example or two?

I realize that, but |x| isn't differentiable over its entire domain anyway.

Let f(x) and g(x) be non-piecewise defined functions that are defined for all real numbers. Furthermore, let f(x) and g(x) be continuous and differentiable at all points. Are there two functions f(x) and g(x) such that f(x)=g(x) for all points over some interval (a,b], and f(x)≠g(x) for all...