Answer : Given: f(x) = highest prime factor of x And since x ∈ A, A = {12, 13, 14, 15, 16, 17}

Value of x can only be 12, 13, 14, 15, 16, 17 Doing prime factorization of the above, we get

Hence, range of f = {2, 3, 5, 7, 13, 17}