The General Term of a Sequence Is Given $$a _ { n } = \frac { ( - 1 ) ^ { n - 1 } } { 7 n } ; S _ { 4 }$$

question 180

Multiple Choice

The general term of a sequence is given. Find the indicated partial sum.
- $$a _ { n } = \frac { ( - 1 ) ^ { n - 1 } } { 7 n } ; S _ { 4 }$$

• A) \(\frac { 25 } { 84 }\)
• B) \(- \frac { 25 } { 84 }\)
• C) \(\frac { 1 } { 12 }\)
• D) \(- \frac { 1 } { 12 }\)

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