Answer Happy

Posted: **Wed May 11, 2022 10:43 pm**

: 1 Recall The Result That The Union Of Two Countable Sets Is Countable Let A And B Be Sets Where B C A Suppose A Is Un 1 (35.4 KiB) Viewed 29 times

1. Recall the result that the union of two countable sets is countable. Let A and B be sets where B C A. Suppose A is uncountable and B is countable. a. Prove that A - B is uncountable. b. As a corollary, prove that the set of irrational real numbers is uncountable.