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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
Solution
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}
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