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Determine whether the following series converges or diverges:

n=1sin(3n)∑n=1∞sin⁡(3n)


Input C for convergence and D for divergence:

(a) Use the comparison test to carefully determine if n=11n2+2n∑n=1∞1n2+2n converges or diverges: this series

For which aa does n=21nalnn∑n=2∞1naln⁡n converge?

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