(-1)" Which of the following is true about the series n=0 3n + 1 (-1)" (a) It diverges because lim n00 3n + 1 n=k (b) It diverges because lim = +00 k-00 -0 3n + 1 3n +1 (c) It converges to a negative number (d) It converges to a positive number (e) It converges to 0

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Q: nº (b) Test the convergence of the series L 8 by ratio test.

A: an+1an = (n+1)58n+1n58n an+1an= (1+1n)58limn→∞(1+1n)58 → (1+1∞)58 = 18

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