Mathematics, 27.06.2019 23:30 william1690

If x + y is rational, must x and y each be rational? a) yes; because the sum of rationals is rational. b) no; because the sum of irrationals is always irrational. c) no; because x and y could be additive inverses of each other. d) yes; because x and y must be integers, and integers are rational.

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If x + y is rational, must x and y each be rational? a) yes; because the sum of rationals is ratio...

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