24-25 Midterm Review (Sets and Set Notation)

Front

What does the symbol ( ∪ ) represent in set theory?

Back

Union

Front

Given sets A = {1, 3, 5, 7, 9} and B = {2, 3, 5, 7}, what is A ∩ B?

Back

{3, 5, 7}

Front

Express the interval [14.2, 19.6) as an inequality.

Back

14.2 ≤ x < 19.6

Front

If U (the universal set) = {1, 3, 5, 7, 9, 11, 13, 15, 17} and W = {5, 7, 9, 11}, what is W'?

Back

{1, 3, 13, 15, 17}

Front

Express the inequality -9 < x ≤ -4 in interval notation.

Back

(-9, -4]

Front

What does the symbol ( ∩ ) represent in set theory?

Back

Intersection

Front

Define a subset in set theory.

Back

A set A is a subset of set B if all elements of A are also elements of B.

Front

What is the complement of a set?

Back

The complement of a set A, denoted A', consists of all elements in the universal set U that are not in A.

Front

How do you denote the empty set?

Back

The empty set is denoted by {} or ∅.

Front

What is the difference between finite and infinite sets?

Back

A finite set has a countable number of elements, while an infinite set has an uncountable number of elements.