Find a formula for the nth partial sum of the series and use it to find the series' sum. 9. +... +(- 1)" -1 5n-1 9- 1. 25 125 1 9 1- (-5) 45 (-5)" 15 O A. S= OB. 1+ 91- 91- (-5)h-1 (-5)-1 15 45 O C. Sn= O D. S,= 1 4. 1+5 1 1+
Find a formula for the nth partial sum of the series and use it to find the series' sum. 9. +... +(- 1)" -1 5n-1 9- 1. 25 125 1 9 1- (-5) 45 (-5)" 15 O A. S= OB. 1+ 91- 91- (-5)h-1 (-5)-1 15 45 O C. Sn= O D. S,= 1 4. 1+5 1 1+
Chapter9: Sequences, Probability And Counting Theory
Section: Chapter Questions
Problem 25RE: Use the formula for the sum of the first nterms of a geometric series to find S9 , for the series...
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