# math

posted by
**sara**
.

Prove that the union of two finite sets is finite.

Hint: A U B = (A - B) U (B - A) U (A ∩ B)

where U = union and ∩ = intersection

posted by
**sara**
.

Prove that the union of two finite sets is finite.

Hint: A U B = (A - B) U (B - A) U (A ∩ B)

where U = union and ∩ = intersection