= (x-1)(x+1) 2-1 (A) Sometimes we incorrectly say that the functions f(x) = and g(x)=x+1 are the exact same function. What is the domain on which it is true to say that f(x) = g(x)? (B) Even though it is only true to say that f(x) and g(x) are equal on a particular domain, explain (x-1)(x+1) why lim za x-1 = lim +1 is correct for all z-values.