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Relations And Functions
D = {x : x is a prime number which is divisor of 60}The divisors of 60 are :1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
∴ x = prime divisor of 60 = 2, 3, 5Hence roster form of D is {2, 3, 5}