Question

one or more of your responses is incorrect. set a is a proper subset of set b, expressed as a⊂b, means that set a is a subset of set b and sets a and b are not equal.

Explanation:

The definition of a proper subset states that set \(A\) is a proper subset of \(B\) (written \(A \subset B\)) when every element of \(A\) is in \(B\), and \(A\) and \(B\) are not identical sets. The blank needs to be filled with the term that matches this definition.

Answer:

proper subset