Question

Consider f: {1, 2, 3} → {a, b, c} given by f(1) = a, f(2) = b and f(3) = c. Find f ⁻¹ and show that (f ⁻¹)⁻¹ = f.

Answer 1

Hence, (f ⁻¹)⁻¹ = f.