यदि 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},
तो निम्नलिखित को ज्ञात कीजिए:
(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

[3,6,9,15,18,21] (ii)[3,9,15,18,21] (iii) [3,6,9,12,18,21] (iv) [4,8,16,20] (v) [2,4,8,10,14,16] (vi) [5,10,20] (vii) [20] (viii) [4,8,12,16] (ix) [2,6,10,14] (x) [5,10,15] (xi) [2,4,6,8,12,14,16] (xii) [5,15,20]