Which of the Given Series Are Absolutely Convergent?
A) $\sum _ { n = 1 } ^ { \infty } \frac { \cos \frac { \pi n } { 8 } } { n \sqrt { n } }$

question 128

Multiple Choice

Which of the given series are absolutely convergent?

• A) \(\sum _ { n = 1 } ^ { \infty } \frac { \cos \frac { \pi n } { 8 } } { n \sqrt { n } }\)
• B) \(\sum _ { n = 1 } ^ { \infty } \frac { \sin 5 n } { n }\)

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