Ch
, the sum of a rational number and an irrational number, must be irrational. Rubric 5 points for a logically correct argument. 9. Let . a (0 be rational, let . b. be irrational, and let . ab (c. Assume . c. is rational. Rewrite . ab (c. as Since . a. is rational and not zero, is rational, and since the set of rational numbers is closed under ... ................
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