Review for Test Chapter 2

List the elements in the set.

 $\left\{x\ |\ x\ is\ an\ integer\ between\ -8\ and\ -4\right\}$  

•  $\left\{-7,\ -6,\ -5\right\}$  

•  $\left\{-8,\ -7,\ -6,\ -5,\ -4\right\}$  

•  $\left\{-8,\ -7,\ -6,\ -5\right\}$  

•  $\left\{-7,\ -6,\ -5,\ -4\right\}$  

Write ths set-builder notation.

{2, 4, 6, 8}

• {x | x is an even natural number less than 10}

• {2, 4, 6, 8}

• {x | x is any even integer less than 10}

• {x | x is any even natural number}

Write ths set-builder notation.

{15, 16, 17, 18}

• {x | x is an integer between 14 and 19}

• {15, 16, 17, 18}

• {x | x is an integer between 15 and 18}

•  {x | x is an integer less than 19}

Identify the set as finite or infinite.

{x | x is a counting number larger that 815}

• Finite

• Infinite

Identify the set as finite or infinite.

{x | x is an odd counting number}

• Finite

• Infinite

Find n(A) for the set.

A={200, 201, 202, ..., 2000}

• n(A)=1801

• n(A)=2000

• n(A)=1800

• n(A)= 4

Determine whether or not the set is well defined.

{x | x is a low-fat ice cream}

• Not well defined

• Well defined

Complete the blank with either  $\in$  or  $\notin$  to make the statement true. 

 $0\ \ \ \ \ \left\{-1,\ 1,\ 3,\ 12,\ 22\right\}$  

•  $\notin$  

•  $\in$  

Complete the blank with either  $\in$  or  $\notin$  to make the statement true. 

 $\left\{7\right\}\ \ \ \ \ \left\{\left\{4\right\},\ \left\{5\right\},\ \left\{6\right\},\ \left\{7\right\},\ \left\{8\right\}\right\}$  

•  $\notin$  

•  $\in$  

Use  $\subseteq$  or  $\not\subseteq$  in the blank to make a true statement. 

{16, 23, 28}     {14, 23, 28, 38}

•  $\not\subseteq$  

•  $\subseteq$