Suppose B is infinite and A is a finite subset of B. Then B - A is infinite. I am supposed to prove this... Any advice?
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Originally Posted by jzellt Suppose B is infinite and A is a finite subset of B. Then B - A is infinite. I am supposed to prove this... Any advice? Greetings jzellt. The definition of the difference of B and A (B - A) could be written as: Hopefully this will help make it more apparent why B - A is infinite.
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