Question: Justify your answer: Let an 2 cos (i) for any n E N. Which of the following is convergent? Justify your answer. (a) The sequence

Justify your answer: Let an 2 cos\" (i) for any n

Justify your answer:

E N. Which of the following is convergent? Justify your answer. (a)

Let an 2 cos\" (i) for any n E N. Which of the following is convergent? Justify your answer. (a) The sequence {an}n21- (b) The series 2 an. 7121

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