An 4n + 3 Determine whether E a, converges or diverges. 40. A series Ea, is defined by the equations 2 + cos n aj = 1 an+1 Vn an

Calculus: Early Transcendentals
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ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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## Series and Convergence Problems

### Practice Problems

Below are several exercises designed to test your understanding of series and their convergence. Work through each problem and determine whether the series converges or diverges.

#### Series Exercises:

**33.**  
\[
\sum_{n=1}^{8} \frac{(-9)^n}{n10^{n+1}}
\]

**34.**  
\[
\sum_{n=1}^{8} \frac{n5^{2n}}{10^{n+1}}
\]

**35.**  
\[
\sum_{n=2}^{8} \left(\frac{n}{\ln n}\right)^n
\]

**36.**  
\[
\sum_{n=1}^{8} \frac{\sin(n\pi/6)}{1 + n\sqrt{n}}
\]

**37.**  
\[
\sum_{n=1}^{8} \frac{(-1)^n \arctan n}{n^2}
\]

**38.**  
\[
\sum_{n=2}^{8} \frac{(-1)^n}{n \ln n}
\]

#### Recursive Series Problems:

**39.**  
The terms of a series are defined recursively by the equation:

\[
a_1 = 2 \quad \text{and} \quad a_{n+1} = \frac{5n + 1}{4n + 3} a_n
\]

**Determine whether** \(\sum a_n\) **converges or diverges.**

**40.**  
A series \(\sum a_n\) is defined by the equations:

\[
a_1 = 1 \quad \text{and} \quad a_{n+1} = \frac{2 + \cos n}{\sqrt{n}} a_n
\]

**Determine whether** \(\sum a_n\) **converges or diverges.**

#### Series of Positive Numbers:

For problems 41 and 42, let \(\{b_n\}\) be a sequence of positive numbers that converge to \(\frac{1}{2}\). Determine whether the given series is absolutely convergent.

**41.**  
\[
\sum_{n=1}^{\infty} \frac{b_n^n \cos n\pi}{n
Transcribed Image Text:## Series and Convergence Problems ### Practice Problems Below are several exercises designed to test your understanding of series and their convergence. Work through each problem and determine whether the series converges or diverges. #### Series Exercises: **33.** \[ \sum_{n=1}^{8} \frac{(-9)^n}{n10^{n+1}} \] **34.** \[ \sum_{n=1}^{8} \frac{n5^{2n}}{10^{n+1}} \] **35.** \[ \sum_{n=2}^{8} \left(\frac{n}{\ln n}\right)^n \] **36.** \[ \sum_{n=1}^{8} \frac{\sin(n\pi/6)}{1 + n\sqrt{n}} \] **37.** \[ \sum_{n=1}^{8} \frac{(-1)^n \arctan n}{n^2} \] **38.** \[ \sum_{n=2}^{8} \frac{(-1)^n}{n \ln n} \] #### Recursive Series Problems: **39.** The terms of a series are defined recursively by the equation: \[ a_1 = 2 \quad \text{and} \quad a_{n+1} = \frac{5n + 1}{4n + 3} a_n \] **Determine whether** \(\sum a_n\) **converges or diverges.** **40.** A series \(\sum a_n\) is defined by the equations: \[ a_1 = 1 \quad \text{and} \quad a_{n+1} = \frac{2 + \cos n}{\sqrt{n}} a_n \] **Determine whether** \(\sum a_n\) **converges or diverges.** #### Series of Positive Numbers: For problems 41 and 42, let \(\{b_n\}\) be a sequence of positive numbers that converge to \(\frac{1}{2}\). Determine whether the given series is absolutely convergent. **41.** \[ \sum_{n=1}^{\infty} \frac{b_n^n \cos n\pi}{n
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