Let A={1, 2, 3, 4} and B={2, 4, 6, 8}. Define a function f:A→B such that f(x) = 2x for all x∈A. Find the image of the set {1, 3} under the function f.

Consider the functions f : A → B, g : B → A and h : B → A such that if gf =14 and fh = 1B. Prove f is a 1-1 correspondence A - B. fla = f and 18f = f. (a) (b)

Which of the following mappings is NOT a function? OA OB C D 1 2 3 4 1 23 4 A C 6 00 2 4 8 0 4 8 1 2 3 4 1 234 B D 0 1 2 3

Let f: R100 the sum of its coordinates. What is O O 1 8 36 100 af əxs → ⓇR be the function that sends each point (X1, X2, X3, . . ., ? *100) in R¹00 to