Question

The set of integers under subtraction is
(A) groupoid
(B) semi-group

Answer 1

3)The set of integers under subtraction is not a group, because it does not satisfy all of the group PROPERTIES: it does not have the ASSOCIATIVE PROPERTY (see the previous lectures to see why). Therefore, the set of integers under subtraction is not a group!

.#Hope it helps..

Answer 2

Answer:

(A)

Step-by-step explanation:

The set of integers under subtraction is groupoid.

Groupoid is a non-empty set with a binary operation, which satisfied only first property (Closure) of group.