Identify the Most Appropriate Test to Be Used to Determine $\sum _ { n = 1 } ^ { \infty } \frac { \cos n } { 6 ^ { n } }$

question 27

Multiple Choice

Identify the most appropriate test to be used to determine whether the series $\sum _ { n = 1 } ^ { \infty } \frac { \cos n } { 6 ^ { n } }$ converges or diverges.

• A) Limit Comparison Test with \(b _ { n } = \frac { 1 } { 6 ^ { n } }\)
• B) Direct Comparison Test with \(b _ { \mathrm { n } } = \frac { 1 } { 6 ^ { n } }\)
• C) Alternating Series Test
• D) Root Test
• E) Ratio Test

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