If A is a subset of B and C is a subset of D, then A intersect C is a subset of B intersect D. Please any help in proving this conditional would be much appreciated
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Originally Posted by leinadwerdna If A is a subset of B and C is a subset of D, then A intersect C is a subset of B intersect D. Please any help in proving this conditional would be much appreciated Suppose that . Then, and . Since , and, because , as well. Thus, .
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