Prove or Disprove Given: For every nonempty set A, there exists a set B such that l A-B l = l B-A l. Proof: Statement is true. Let A not equal an empty set. Then let B=A. Then A-B=B-A=empty set. So l A-B l = l B-A l = 0.
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Originally Posted by Possible actuary Prove or Disprove Given: For every nonempty set A, there exists a set B such that l A-B l = l B-A l. Proof: Statement is true. Let A not equal an empty set. Then let B=A. Then A-B=B-A=empty set. So l A-B l = l B-A l = 0. Seems ok to me
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