Set-Builder And Interval Notation Worksheet

                    Lesson 1

Problem:     

Solution             means "included" or "closed"

                                                            Step 1:                         

Solution             means "not included" or "open"

Step 2:  

Solution      U which stands for "union".

Step 3:  

                                                            Solution The given statement can be written as: (-4 ,2]  U  [ 6 , 9]

                                                            Step 4:

                                                            Solution      Answer: (-4 , 2] U [ 6 , 9]

                                                            Step 5:  

Complete      

                                                            Try two practice problems:  

1.	Write the following inequality in interval notation: -9 < x  or  4  <  x  <  5
2.	What is the difference between the number line graphs of these two intervals:   [-3, -1] U (3, 7]?

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