Question

For any two sets A,B verify by an example that A–B,AnB,B–A are mutually disjoint

Answer 1

To show mutually disjoint sets they should not have any common element.
for A-B & AnB
(A-B) n (AnB)= An(AnB) - Bn(BnB)
= AnB - B
No element We can show similarly for other