Determine whether the series is convergent or divergent by using an appropriate test: cos(2n²+3)+2 √n5+n+1 (a) vnttnvn+1 (n+3)√n² +1+n√n+1 Σ; n=1 (b) Σ n=1

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A: Since you have posted a question with sub-parts greater than three. We will provide the solution…

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A: Explanation of the answer is as follows

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