Chapter 24, PROBLEM SET 24.2 #17

Using a Venn diagram, show that if and only if A ⊆ B if and only if A ∪ B = B.

PROBLEM SET 24.2:

PROBLEM SET 24.3:

PROBLEM SET 24.4:

PROBLEM SET 24.5:

PROBLEM SET 24.6:

PROBLEM SET 24.7:

PROBLEM SET 24.8:

PROBLEM SET 24.9: