Sigma Notation And Series

                     Lesson 1

                                                                                                                                                                          

                                                             Problem:                   Find S3 for the sequence: 5, 12, 18, 26, 30, 45

                                                             Solution                    S3 is given as: S3 = a1+a2+a3

                           Step 1:  

                     

                                                                                Solution                          S3 = 5+12+18

 Step 2:                        

 

                                                            Solution                          S3 = 35

                                                             Step 3: 

                                                             

 Solution                    The answer is:  35

 Step 4:                                                                      

 Complete                                                                   

                                                                                  

                                             

                                                             Try two practice problems:  

 

                                                                                               Solve the following:

 

A.

Find S3 for the sequence: 7, 10, 15, 24, 35

 

B.

Find S3 for the sequence:

an= (1/5)n

 

                                                                                                 

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