jenstets05
20.12.2019 •
Mathematics
Test the series for convergence or divergence.
∑[infinity](n=1) (-1)^n/n5^n
a. identify bn.
b. evaluate the following limit. lim n → [infinity] bn
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Ответ:
The series converges, and the limit of bn when n→∞ is 0
Step-by-step explanation:
A) The nth term of this series is . We use the ratio test to decide the convergence of the series. Let . Then . We obtain that therefore the series converges.B) If we had then by the divergent series test, the series would be divergent which contradicts part A). We conclude that this limit must be 0.Ответ:
= 2.014*10 1
i believe i am corect like 90%
hope this helps