Question: Question 8 Test. lest 3 Question 8 of 40 Next question Find a formula for the nth partial sum of the series and use it
Question 8

Test. lest 3 Question 8 of 40 Next question Find a formula for the nth partial sum of the series and use it to find the series' sum. 9 9 9 9 - 9 5 25 125 + ... + (-1)1-1_ 50- 1 -+ ... 91 ( -5) 9 1- OA. S= 45 (-5)" A OB. S= 15 S= 1+ N 1+ 5 9 1 - (-5)0 - 1 9 OC. S. = En (-5)0-1 OD. S.= 45 S=- 1+- 1+
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