alternating series an alternating series is a series where terms alternate in sign
TRANSCRIPT
Alternating SeriesAn alternating series is a series where terms alternate in sign.
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Thm. Alternating Series Test
The alternating series Ʃ(-1)nan will converge if
i)
ii) an is a decreasing sequence (an + 1 < an)
lim 0nna
Ʃan is absolutely convergent if Ʃ|an| and Ʃan
both converge.
Ʃan is conditionally convergent if Ʃan
converges but Ʃ|an| diverges.
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Thm. Alternating Series Remainder
If you use N terms to approximate the sum of the convergent alternating series Σ(-1)nan, then the error is less than aN + 1.
Ex. Approximate the value of
using the first 6 terms. How many terms are needed to ensure an error less than .001?
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