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How many terms of the series \(\sum \frac{2}{n^{1.1}}\) should be used to estimate its value with an error of at most 0.0001?

A. 1000 terms
B. 5000 terms
C. 10000 terms
D. 20000 terms

Answer :

Final answer:

To estimate the value of the series ∑(2/n^1.1) with an error of at most 0.0001, you would need at least 2015 terms.

Explanation:

To estimate the value of the series ∑(2/n^1.1) with an error of at most 0.0001, we need to find the number of terms required. The formula for the error term in an alternating series is given by |a(n+1)|.

In this case, |a(n+1)| = |2/(n+1)^1.1|. We want this term to be less than or equal to 0.0001, so:

|2/(n+1)^1.1| ≤ 0.0001

Solving this inequality, we find that n+1 ≥ (2/0.0001)^(1/1.1).

Using a calculator, we can find that (2/0.0001)^(1/1.1) ≈ 2015.6. Therefore, the value of n should be at least 2015.

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