Or whatever/0 For the article what it try to do is using limit to see whether the difference converge to a finite number diff(x) = one(x)/zero’(0) -

Or whatever/0 For the article what it try to do is using limit to see whether the difference converge to a finite number diff(x) = one(x)/zero’(0) - zero(x)/zero’’(0) Where one and all zero function approach 1 and 0, smooth etc Find diff(x) when lim x-> 0