Question

Two functions f and g are said to be equal if f
(a) the domain of f = the domain of g. (b) the co-domain of f = the co-domain of g
(c) f(x) = g(x) for all x, (d) all of above

Answer 1

Answer:

We say two functions f and g are equal if they have the same domain and the same codomain, and if for every a in the domain, f(a)=g(a). ... We often write f:A→B to indicate that f is a function from A to B.