Letting $W$ stand for the set of whole numbers, I the set of integers, $I ^ { + }$the set of positive integers, and $I ^ { - }$the set of negative integers, perform the indicated operation.
-Find W - I
A) $\varnothing$
B) $\mathrm { I } ^ { - }$
C) I
D) $\mathrm { I } ^ { + }$

Question

Letting $W$ stand for the set of whole numbers, I the set of integers, $I ^ { + }$the set of positive integers, and $I ^ { - }$the set of negative integers, perform the indicated operation.
-Find W - I 
A) $\varnothing$
B) $\mathrm { I } ^ { - }$
C) I
D) $\mathrm { I } ^ { + }$

Quizplus · Accepted Answer

The set of whole numbers $W$ includes all non-negative integers (0, 1, 2, 3, ...), while the set of integers $I$ includes all negative integers, zero, and all positive integers (... -3, -2, -1, 0, 1, 2, 3, ...). Subtracting $I$ from $W$ essentially removes all elements that are in both sets, leaving no elements behind. Therefore, the result is the empty set $\varnothing$.

Letting WWW Stand for the Set of Whole Numbers, I the Set

Letting $W$ Stand for the Set of Whole Numbers, I the Set