Class 11 Maths Chapter Sets - NCERT Exercise 1.4 (Q 9 - Q 12)
Q9: If A = {3, 6, 9, 12, 15, 18, 21},
B = { 4, 8, 12, 16, 20 },
C = { 2, 4, 6, 8, 10, 12, 14, 16 },
D = {5, 10, 15, 20 };
find
(i) A – B
(ii) A – C
(iii) A – D
(iv) B – A
(v) C – A
(vi) D – A
(vii) B – C
(viii) B – D
(ix) C – B
(x) D – B
(xi) C – D
(xii) D – C
Answer:
(i) A – B
= {3, 6, 9, 15, 18, 21}
(ii) A – C = {3, 9, 15, 18, 21}
(iii) A – D = {3, 6, 9, 12, 18, 21}
(iv) B – A = {4, 8, 16, 20}
(v) C – A = {2,4,8,10,14,16}
(vi) D – A = {5,10,20}
(vii) B – C = {20}
(viii) B – D = {4,8,12,16}
(ix) C – B = {2,6,10,14}
(x) D – B = {5,10,15}
(xi) C – D = {2,4,6,8,12,14,16}
(xii) D – C = {5,15,20}