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Kitten_is_back
 one year ago
For which operations is the set {–1, 1} closed?
Choose all answers that are correct.
A.
addition
B.
subtraction
C.
multiplication
D.
division
Kitten_is_back
 one year ago
For which operations is the set {–1, 1} closed? Choose all answers that are correct. A. addition B. subtraction C. multiplication D. division

This Question is Closed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0If I remember what these questions are about, C, and D are correct. \[1 \times 1 = 1 \] \[\dfrac{1}{1} = 1\] Negative one is part of the set. Ergo, closed.

Kitten_is_back
 one year ago
Best ResponseYou've already chosen the best response.0so times and subtraction?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Subtraction does not work, since you get 0, and that is not part of the set.

Kitten_is_back
 one year ago
Best ResponseYou've already chosen the best response.0okay so its a c or d we know its c what about addition?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Actually we know it is both, C, and D. Any my bad, with addition we get zero, subtraction gives us 2, which is also not in the set.

Kitten_is_back
 one year ago
Best ResponseYou've already chosen the best response.0okay so its just c d?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Addition: 1 + 1 = 0. Subtraction: 1  1 = 2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0B gives 2, and the set is only {1, 1} so no.
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