Question

Ok this is the last question that i have on this test:

Show that if A and B are sets with A⊆B, then A∪B=B and A∩B=A

Hint: Consider a membership table--Is there a row that is impossible?

this is the table i have:

A B a U b A n B
1 1 1 1
1 0 1 0
0 1 1 0
0 0 0 0



do I just need the graph? teacher said to put some words with it so now i'm not completely sure how to word it.

Answer 1

@hartnn

Answer 2

heard of Venn Diagram ?