Question

Write the followings sets in roster form :

(i) A = {x : x is an integer and -3 ≤ x ≤ 7}

(ii) B = {x : x is a natural number less than 6}

(iii) C= (x: x is a two-digit natural number such that the sum of its digits is 8}

(iv) D - (x : x is a prime number which is divisor of 60}

(v) E = The set of all letters in the word TRIGONOMETRY.

(vi) F = The set of all letters in the word BETTER.

Answer 1

Roster form of given sets are as follows :

(i) A = {-3, -2, -1,0,1,2,3,4,5,6}

(ii) B = {1,2,3,4,5}

(iii) C = {17, 26, 35, 44, 53, 62, 71, 80}, here sum of digits of all numbers is 8.

(iv) D = {2, 3, 5}, here 2, 3 and 5 are prime numbers which are divisor of 60.

(v) E = { T, R, I, G. O, N, M,E, Y}, here letters are not repeated.

(vi) F= {B, E, T, R}, here letters are not repeated.