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

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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.
  1. Snell Bros. Math
  2. Math
  3. Proof
  4. Set Theory
  5. Logic
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What kind of question is this? Prove that whatever is in A and B is within A?

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