Sets and Set Notation

V = {a, b, c, d e, f, g} has 7 elements.

• True

• False

U= {1, 3, 4, 5, 6, 7, 8, e, h, 10}

A = {3, e}

B = {1, 8, 10, h, 6}.

Which is true?

• 
  

  $A\subseteq U$

• $B\notin U$

• $A\ \not\subseteq\ U$

• $A\in B$

What is ∅ or { } mean?

• equal sets

• superset

• empty set

• subset

Another term for member of a set.

• element

• set

• set notation

• roster method

What is the set builder notation for B = {9, 18, 27, 36, 45, 54,...}

• B = {x/x is a multiple of 9}

• B = {x/x is a power of 9}

What does

 $\notin$  mean?

• Not an element of

• Not extra

• Not sometimes less than

• There does not exist something

Which of the following is a subset of set G?

G = {d, a, r, e}

• A = {e, a, r}

• B = {r, e, d}

• C = {e, r, a}

• All of the above.

Determine the type of set.

Even numbers

• finite

• infinite

• null

Which of the following two sets are equal?

• A = {1, 2} and B = {1}

• A = {1, 2} and B = {1, 2, 3}

• A = {1, 2, 3} and B = {2, 1, 3}

• A = {1, 2, 4} and B = {1, 2, 3}

Write X = {1, 4, 9, 16, 25,…} in set builder form.

• X = {x: x is a set of prime numbers}

• X = {x: x is a set of whole numbers}

• X = {x: x is a set of natural numbers}

• X = {x: x is a set of square numbers}