Solve the Problem $2,1 , \frac { 1 } { 2 } , \frac { 1 } { 4 } , \ldots$

question 99

Multiple Choice

Solve the problem.
-For the geometric sequence $2,1 , \frac { 1 } { 2 } , \frac { 1 } { 4 } , \ldots$ , find $\mathrm { a } _ { \mathrm { n } }$ .

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

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