Find a Formula For $a _ { n }$ For the Arithmetic Sequence

question 36

Multiple Choice

Find a formula for $a _ { n }$ for the arithmetic sequence.
$$a _ { 4 } = - 13 , a _ { 13 } = - 31$$

• A) \(a _ { n } = - 7 - 2 n\)
• B) \(a _ { n } = 5 - 7 n\)
• C) \(a _ { n } = - 2 - 7 n\)
• D) \(a _ { n } = - 7 ( - 2 ) ^ { n }\)
• E) \(a _ { n } = - 5 - 2 n\)

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