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[ Part 1 ] Determine the convergence or divergence, using the most appropriate test. State what...

[ Part 1 ]

Determine the convergence or divergence, using the most appropriate test. State what test you are using and show your work.

1a) ∑ 1 / cos(2k·π)

1b) ∑ (−1)^k 1 / k+1

1c) ∑ ek^2 + 3k + 1 / π·k^12 + 5k + 3

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