Table of contents

0. Functions7h 52m
1. Limits and Continuity2h 2m
2. Intro to Derivatives1h 33m
3. Techniques of Differentiation3h 18m
4. Applications of Derivatives2h 38m
5. Graphical Applications of Derivatives6h 2m
6. Derivatives of Inverse, Exponential, & Logarithmic Functions2h 37m
7. Antiderivatives & Indefinite Integrals1h 26m
8. Definite Integrals4h 44m
9. Graphical Applications of Integrals2h 27m
- Area Between Curves
  1h 18m
- Introduction to Volume & Disk Method
  1h 8m
10. Physics Applications of Integrals 3h 16m
- Kinematics
  1h 13m
- Work
  2h 3m
11. Integrals of Inverse, Exponential, & Logarithmic Functions2h 34m
12. Techniques of Integration7h 39m
13. Intro to Differential Equations2h 55m
14. Sequences & Series5h 36m
15. Power Series2h 19m
- Introduction to Power Series
  1h 9m
- Taylor Series & Taylor Polynomials
  1h 10m
16. Parametric Equations & Polar Coordinates7h 58m

14. Sequences & Series

Convergence Tests

Calculus

14. Sequences & Series

Convergence Tests

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Multiple Choice

Use the divergence test to determine if the following series diverge or state that the test is inconclusive.
$\sum_{n = 1}^{\infty} \frac{n^{2}}{n (n^{2} - 1000)}$

Divergent

Convergent

Inconclusive

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Verified step by step guidance

Step 1: Recall the divergence test, which states that if the limit of the sequence of terms $ a_n $ (the general term of the series) as $ n \to \infty $ does not equal zero, then the series diverges. If the limit equals zero, the test is inconclusive.

Step 2: Identify the general term of the series $ a_n = \frac{n^2}{n(n^2 - 1000)} $. Simplify the expression to $ a_n = \frac{n}{n^2 - 1000} $.

Step 3: Compute the limit $ \lim_{n \to \infty} a_n = \lim_{n \to \infty} \frac{n}{n^2 - 1000} $. To evaluate this limit, divide both the numerator and denominator by $ n^2 $, resulting in $ \lim_{n \to \infty} \frac{1/n}{1 - 1000/n^2} $.

Step 4: Analyze the behavior of the terms as $ n \to \infty $. The term $ 1/n \to 0 $ and $ 1000/n^2 \to 0 $, so the denominator approaches $ 1 $. Therefore, $ \lim_{n \to \infty} a_n = 0 $.

Step 5: Conclude that since $ \lim_{n \to \infty} a_n = 0 $, the divergence test is inconclusive. This means the test does not provide information about whether the series converges or diverges.