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11-49.
  1. Multiple Choice: The interval of convergence of the power series is: Homework Help ✎

    1. (−∞, ∞)

    2. [−1,1]

    3. [−1,1)

    4. (−1,1]

    5. (−1,1)

Use the Ratio Test.

If x = –1:

Does this resultant series converge or diverge?
Be sure to check the resultant series if x = 1.