Let Q be the set of all rational nos and P be the set of all irrational nos.Then?

0 ⤊

Let Q be the set of all rational nos and P be the set of all irrational nos.Then?

answers
a)P is closed for addition but Q is not closed for addition
b)P as well as Q is closed for addition
c)Q is closed for addition for Q is not closed for addition
d)none

2007-10-06 01:43:01 · 1 answers · asked by Sowmyasri M 1 in Science & Mathematics ➔ Mathematics

1 answers

Your foil c) may be a misprint. The facts are these: The set of rationals is closed under addition, but the set of irrationals is not. For example, sqrt(2) - sqrt(2) = 0, but 0 is rational.

2007-10-06 02:00:47 · answer #1 · answered by Tony 7 · 0⤊ 0⤋