Write the Expression for the General (Or Nth)termrm $\mathbf { a } _ { \mathbf { n } } ,$

question 138

Multiple Choice

Write the expression for the general (or nth) termrm, $\mathbf { a } _ { \mathbf { n } } ,$ , of the geometric sequence.
--8, -24, -72, -216, -648,. . .

• A) \(a _ { n } = - 8 ( 3 ) ^ { n }\)
• B) \(a _ { n } = - 8 ( 3 n )\)
• C) \(a _ { n } = - 8 ( 3 ) ^ { n - 1 }\)
• D) \(a _ { n } = a _ { 1 } + 3 ^ { n }\)

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