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Review of Convergence Tests

Total questions: 20

Worksheet time: 37mins

Name
Class
Date
1.

nth term test:

If the limit as n approaches infinity of a series is (a)   zero, then the series will diverge.

2.

Geometric Series:

A geometric series will converge if (a)   .

3.

Geometric Series:

If a geometric series converges, the sum of the series will be equal to...

a)

air+1\frac{a_i}{r+1}

b)

air1\frac{a_i}{r-1}

c)

ai1+r\frac{a_i}{1+r}

d)

ai1r\frac{a_i}{1-r}

4.

Integral test:

If the integral (a)   , then the series converges.

5.

p-series:

A p-series will converge if (a)   .

6.

Direct comparison test:
Given that

 0<an<bn0<a_n<b_n  
select which of the following statements is true.

a)

If  b_n  diverges, then  a_n  diverges.

b)

If  bnb_n  converges, then  ana_n  converges.

c)

If  ana_n  converges, then  bnb_n  converges.

d)

If  a_n  diverges, then  b_n  converges.

7.

Limit Comparison Test:
Given that

 limn anbn=L\lim_{n\rightarrow\infty}\ \frac{a_n}{b_n}=L  , where L is finite and positive, then

a)

 ana_n  and  bnb_n  have the same behavior (both converge or both diverge)

b)

 a_n  and  b_n  have the opposite behavior (one converges and the other diverges)

8.

Alternating Series Test:
An alternating series will converge if:

 limn an=\lim_{n\rightarrow\infty}\ a_n=  



(a)  

9.

Alternating Series Test:
An alternating series will converge if:

 an+1a_n+1   (a)      ana_n  

10.

Ratio Test:
A series will converge by the ratio test if

 \lim_{n\rightarrow\infty}\left|\frac{a_{\left(n+1\right)}}{a_n}\right|   (a)   1

11.

Will the series converge or diverge?

 \sum_{n=1}^{\infty}\frac{n!}{n\cdot3^n}  

a)

converge

b)

diverge

12.

Will the series converge or diverge?

 n=112n+3\sum_{n=1}^{\infty}\frac{1}{2n+3}  

a)

converge

b)

diverge

13.

Will the series converge or diverge?

 n=13n49n+2\sum_{n=1}^{\infty}\frac{\sqrt{3n-4}}{\sqrt{9n+2}}  

a)

converge

b)

diverge

14.

Will the series converge or diverge?

 n=13n8(n+1)\sum_{n=1}^{\infty}\frac{3^n}{8^{\left(n+1\right)}}  

a)

converge

b)

diverge

15.

Will the series converge or diverge?

 n=1n23n133\sum_{n=1}^{\infty}\frac{n^{\frac{2}{3}}}{n^{\frac{13}{3}}}  

a)

converge

b)

diverge

16.

Will the series converge or diverge?

 n=1n+2(n+1)3\sum_{n=1}^{\infty}\frac{n+2}{\left(n+1\right)^3}  

a)

converge

b)

diverge

17.

Will the series converge or diverge?

 n=1(1)nenn\sum_{n=1}^{\infty}\left(-1\right)^n\cdot\frac{e^n}{\sqrt{n}}  

a)

converge

b)

diverge

18.

Will the series converge or diverge?

 n=1nen2\sum_{n=1}^{\infty}n\cdot e^{-n^2}  

a)

converge

b)

diverge

19.

The function f is defined by

 f\left(x\right)=\sum_{n=0}^{\infty}\left(\frac{x}{3}\right)^n  
What is the value of f(1)?
Enter your answer as a fraction in simplest form.



(a)  

20.

What is the value of

 \sum_{n=1}^{\infty}\frac{7^n}{10^{\left(n+1\right)}}  
Enter your answer as a fraction in simplest form.



(a)