Question

ANSWER ASAPPPP

Which of the following sets are closed under addition? Select all that apply.


A) Integers
B) irrational numbers
C) whole numbers
D) polynomials

Answer 1

A, C, D

Explanation:

The sum of two irrational numbers may be rational:

√2 + (-√2) = 0

so that set is not closed under addition.

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For any of the other sets, addition of two members of the set always results in another (not necessarily different) member of the set.