Short Answer TypeD = {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, 5
Hence roster form of D is {2, 3, 5}
Write the following intervals in set-builder form :
(i)-∞ 31 (ii) (-∞, 0) (iii) [-1, ∞) (iv) (3, ∞)
Write the following sets in the roster form :
(i) A = {jt : x ∊ Z and x is a root of the quadratic equation x2 - 3x - 10 = 0}
(ii) B = {x : x ∊ N, -5 < x - 2 < 5}
(iii) C = {x : jc is an odd prime number less than 30}
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