Find a General Term an for the Geometric Sequence $$a _ { 2 } = - 1 , \text { ag } = \frac { 1 } { 128 }$$

question 285

Multiple Choice

Find a general term an for the geometric sequence.
- $$a _ { 2 } = - 1 , \text { ag } = \frac { 1 } { 128 }$$

• A) \(a _ { n } = 2 \left( - \frac { 1 } { 2 } \right) ^ { n }\)
• B) \(a _ { n } = \frac { 1 } { 2 } ( - 2 ) n - 1\)
• C) \(a _ { n } = 6 \left( - \frac { 1 } { 4 } \right) ^ { n - 1 }\)
• D) \(a _ { n } = 2 \left( \frac { 1 } { 2 } \right) ^ { n - 1 }\)

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