Question 530531
You are correct in saying that A = B since they both equal the set {1, 2, 3, 4, 5}



Note: this is assuming that you've defined the natural numbers to be the set of positive integers.




Also, since A = B, we can say that A ⊆ B, B ⊆ A



This is part of the definition of set equality.



However, we cannot say that A ⊂ B or B ⊂ A since no one set is smaller than the other.