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Multiple Choice
For which values of does the series converge?
A
For all
B
For all
C
For all
D
For all
Verified step by step guidance
1
Step 1: Recognize that the given series is an alternating series due to the presence of the term (-1)^(n+1). Alternating series often converge under specific conditions, such as the Alternating Series Test.
Step 2: Recall the Alternating Series Test, which states that an alternating series converges if the absolute value of the terms decreases monotonically and approaches zero as n approaches infinity. Analyze the term 1/n^p to determine its behavior.
Step 3: Consider the condition for absolute convergence. For the series to converge absolutely, the series sum_{n=1}^{ ext{∞}} 1/n^p must converge. This happens when p > 1, as the p-series test indicates that the series converges for p > 1.
Step 4: For p = 1, the series sum_{n=1}^{ ext{∞}} 1/n diverges (harmonic series), so the given series does not converge absolutely. However, for p > 1, the series converges absolutely, and for 0 < p ≤ 1, the series does not converge absolutely.
Step 5: Conclude that the series converges for all p > 1 based on the p-series test and the Alternating Series Test. For p ≤ 1, the series does not converge.