Question

For which operations is the {-1, 0, 1} closed?

Choose all answers that are correct



A. Addition

B. Division

C. Multiplication

D. Subtraction

Answer 1

HELP PLEASE!?

Answer 2

Some things to ask yourself:

(1) Is \(1+1\) in the set? (check for closure under addition)
(2) Is \((-1)-(+1)\) in the set? (check for closure under subtraction, though technically the same as addition)
(3) Is \(\dfrac{1}{0}\) in the set? (check for closure under division)