Which of the following is a fundamental concept in set theory that refers to a well-defined collection of distinct objects?

What is the mathematical symbol used to represent the empty set, which contains no elements?

Which of the following is a fundamental operation in set theory that combines two sets into a single set containing all elements from both sets?

What is the mathematical symbol used to represent the intersection of two sets, which consists of elements that are common to both sets?

Which of the following is a fundamental concept in logic that refers to a statement that is true for all values of its variables?

What is the mathematical symbol used to represent the negation of a proposition, which is the opposite of the proposition?

Which of the following is a fundamental operation in logic that combines two propositions into a single proposition that is true if and only if both propositions are true?

What is the mathematical symbol used to represent the disjunction of two propositions, which is true if either or both propositions are true?

Which of the following is a fundamental concept in logic that refers to a statement that implies another statement?

What is the mathematical symbol used to represent the equivalence of two propositions, which means that they have the same truth value?

Which of the following is a fundamental concept in set theory that refers to a set that is a subset of another set?

What is the mathematical symbol used to represent the proper subset relation, which means that a set is a subset of another set but not equal to it?

Which of the following is a fundamental concept in logic that refers to a statement that is true for some values of its variables?

What is the mathematical symbol used to represent the universal statement, which means that a statement is true for all values of its variables?

Which of the following is a fundamental concept in set theory that refers to the number of elements in a set?