Ex 1.1, 6 - Match roster form to set-builder form - Sets

Ex 1.1, 6 - Chapter 1 Class 11 Sets - Part 2
Ex 1.1, 6 - Chapter 1 Class 11 Sets - Part 3
Ex 1.1, 6 - Chapter 1 Class 11 Sets - Part 4

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Ex 1.1, 6 Match each of the set on the left in the roster form with the same set on the right described in set–builder form: (i) {1, 2, 3, 6} (a) {x : x is a prime number and a divisor of 6} (ii) {2, 3} (b) {x : x is an odd natural number less than 10} (iii) {M,A,T,H,E,I,C,S} (c) {x : x is natural number and divisor of 6} (iv) {1, 3, 5, 7, 9} (d) {x : x is a letter of the word MATHEMATICS}. {x : x is a prime number and a divisor of 6} 6 = 6 × 1 6 = 3 × 2 1, 2, 3, 6 are divisors of 6 , out of which 2, 3 are prime So, (ii) matches (a) (i) {1, 2, 3, 6} (a) {x : x is a prime number and a divisor of 6} (ii) {2, 3} (b) {x : x is an odd natural number less than 10} (iii) {M,A,T,H,E,I,C,S} (c) {x : x is natural number and divisor of 6} (iv) {1, 3, 5, 7, 9} (d) {x : x is a letter of the word MATHEMATICS}. {x : x is an odd natural number less than 10} Natural numbers are 1, 2, 3, 4, 5, 6, 7, 8,… Odd Natural numbers are 1, 3, 5, 7, 9, 11, 13 Odd natural numbers less than 10 are 1, 3, 5, 7, 9 Hence, (iv) matches (b) (i) {1, 2, 3, 6} (a) {x : x is a prime number and a divisor of 6} (ii) {2, 3} (b) {x : x is an odd natural number less than 10} (iii) {M,A,T,H,E,I,C,S} (c) {x : x is natural number and divisor of 6} (iv) {1, 3, 5, 7, 9} (d) {x : x is a letter of the word MATHEMATICS}. {x : x is a natural number and a divisor of 6} 6 = 6 × 1 6 = 3 × 2 1, 2, 3, 6 are divisors of 6 , So, (i) matches (c) (i) {1, 2, 3, 6} (a) {x : x is a prime number and a divisor of 6} (ii) {2, 3} (b) {x : x is an odd natural number less than 10} (iii) {M,A,T,H,E,I,C,S} (c) {x : x is natural number and divisor of 6} (iv) {1, 3, 5, 7, 9} (d) {x : x is a letter of the word MATHEMATICS}. {x : x is a letter of the word MATHEMATICS}. There are 8 letters of the word MATHEMATICS and 3 letters M, A and T are repeated, So, (iii) matches (d).

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.