The first several terms of a sequence are given. Find the indicated partial sum.
-$$- 7 , - 5 , - 3 , - 1 , \ldots ; S _ { 5 }$$
A)-35
B)75
C)-15
D)21

Name: The first several terms of a sequence are given. Find the indicated partial sum. -\[- 7 , - 5 , - 3 , - 1 , \ldots ; S _ { 5 }\] A)-35 B)75 C)-15 D)21
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Question

Quizplus · Accepted Answer

The sequence is an arithmetic sequence with a common difference of 2. The first term is -7. To find the fifth partial sum, $S_5$, we add the first five terms: $-7 + (-5) + (-3) + (-1) + 1 = -15$.

The First Several Terms of a Sequence Are Given −7,−5,−3,−1,…;S5- 7 , - 5 , - 3 , - 1 , \ldots ; S _ { 5 }−7,−5,−3,−1,…;S5​

The First Several Terms of a Sequence Are Given $- 7 , - 5 , - 3 , - 1 , \ldots ; S _ { 5 }$