Prove that A intersection B is a subset of A for any sets A and B.

Here we are proving another theorem within set theory. This theorem is covered in "A Transition to Advanced Mathematics," by Smith, Eggen, and St. Andre.

[@estolee5485]

This seems very contrived

[@snellbrosmath]

Some set theory does come across like that.

[@ns-sj7gi]

What kind of question is this? Prove that whatever is in A and B is within A?

[@snellbrosmath]

Exactly! It is always a theorem in books, so I covered it. I'm trying to really develop the theory before doing more interesting problems.

[@johnsutton9506]

Discrete math

[@ns-sj7gi]

@@snellbrosmath appreciate the videos merry xmas

[@snellbrosmath]

@ns-sj7gi Thank you! I have a blast making them, too! Merry Christmas!