Question

Which of these sets of numbers is a subset of the real numbers?
1. integers
2. irrational numbers
3.all of these
4.rational numbers

If A = {2, 3, 4, 5} and B = {5, 6, 7, 8}, what is A n ( n means intersection) B?
1.zero with a line in it
2.{5}
3.{2,3,4,5,6,7,8}

Answer 1

3. all of these (all are subset of real numbers)

2. {5} AnB if A = {2, 3, 4, 5} and B = {5, 6, 7, 8}

Answer 2

how about the first question

Answer 3

3, as I said above

Answer 4

oh srry