Question

Let A = {1, 2, 3, 4} and B = N. Let f : A → B be defined by f(x) = x³ then, find the range of f

Answer 1

A = {1, 2, 3, 4}

B = {1, 2, 3, 4, 5, ….}

f(x) = x³

f(1) = 1³ = 1

f(2) = 2³ = 8

f(3) = 3³ = 27

f(4) = 4³ = 64

Range = {1, 8, 27, 64}