Find an Explicit Rule for the Nth Term of the Sequence

question 40

Multiple Choice

Find an explicit rule for the nth term of the sequence.
- $$- 1 , - 5 , - 25 , - 125 , \ldots$$

• A) \(a _ { n } = 5 \cdot - 1 ^ { n }\)
• B) \(a _ { n } = - 1 \cdot 5 ^ { n - 1 }\)
• C) \(a _ { n } = - 1 \cdot 5 ^ { n }\)
• D) \(a _ { n } = 5 \cdot - 1 ^ { n + 1 }\)

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