Which of the given statement is correct if you apply nth-Term Test to the series 9. COS n= A) The series converges to 1 B) The series diverges. C) The series converges to 5. D)The series converges to9 E) The test is inconclusive.

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A: Note: Our guidelines we are supposed to answer only one question. Kindly repost other question as…

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A: Apologies for the inconvenience. Here is the complete solution:   Given series is = ∑n=1∞an where…

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