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 I $\cap \mathrm { I }$
A) $\varnothing$
B) $W$
C) I
D) 0

Question

Quizplus · Accepted Answer

The intersection of a set with itself is always the set itself, so $I \cap I = I$.

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

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