Question

Write each of the following sets in Roster form and write the cardinal number of each :
(i) A = {x : x is an integer, -3 < x < 4}.

(ii) B = {x : x € N, 3x – 6 < 9}.

(iii) C = {3 : x = n2, n e N, 10 < n < 16).

(iv) D = {x : x € W, X – 3 < 2}.

(U) E = {x : x = 2n - 1,ne N and n < 6).

(vi) F = {x : x is a letter in the word 'COMMON').

(vii) G = {x : x is a primary colour}.

(viii) H = {x : x is a digit in the numeral 2362}.

(ix) J=X :X =n п neN,4<n<10)

4. Write each of the following sets in set-builder form :
(i) A = {4, 6, 8, 9, 10, 12, 14, 15, 16, 18).

(ii) B = {1, 2, 3, 5, 6, 10, 15, 30).

(iii) C = {-9, -6, -3, 0, 3, 6, 9, 12, 15).
1 2 3

(iv) D=1/2,2/3,3/4,4/5,5/6,6/7,7/8,8/9

(v) E= 1/3'1/5'1/7'1/ 11'1/ 13'1/ 17' 1/19

(vi) F = {April, June, September, November}.

(vii) G = {0}.

(viii) H = { }.

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Answer 1

Answer:

iv) D=1/2,2/3,3/4,4/5,5/6,6/7,7/8,8/9