Question

fill in the blank so that the resulting statement is true. set a is a proper subset of set b, expressed as dropdown, means that set a is a subset of set b and dropdown. the options for the first dropdown are: a⊈b, a⊆b, a⊄b, a⊂b

Explanation:

1. The standard notation for a proper subset of set A relative to set B is $A \subset B$.
2. By definition, a proper subset requires that A is a subset of B and there exists at least one element in B that is not in A (simplified to "set A is not equal to set B").

Answer:

First dropdown: $A \subset B$
Second dropdown: set A is not equal to set B