Question

how to do the last some

Answer 1

first we have to find all the sets then compare them . I have found 2 equal sets .e.i. 1 & 4 and 2&3

answers are:
1. {6,7,8}
2. {3,4,5,6,7,8}
3. {3,4,5,6,7,8}
4. {6,7,8}