1-п a, 1) n'

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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Mathematics
Second Year
Electrical & Electronic Engineering Department
Dr. Atheer Alaa Sabri
Exercises on Sequences
Find the values of a, a,, a, and a, for the following sequences
1-n
1
a, =
n!
(-1)*1
1)
а,
2)
3)
a =
%3D
2n -1
2"
a, =
2n+1
2" –1
a,
4)
an
= 2+(-1)"
5)
6)
2"
Find a formula for the n" term of the following sequences
1) 1,-1,1,-1,1,..
2) -1,1,–1,1,-1,..
3) 1,-4,9,-16,25,...
1 1
1
1
1.-
4'9
5) 0,3,8,15,24,..
6) - 3,-2,-1,0,1,..
4)
16 25
7) 1,5,9,13,17,..
8) 2,6,10,14,18,...
9)
1,0,1,0,1,...
Which of the following sequences converge and which diverge?
1)
a, = 2+ (0.1)"
Ans. Converges, 2
1- 2n
2)
a =
Ans. Converges, -1
1+2n
1-5n*
3)
a, =
4
Ans. Converges, -5
n* + 8n
n? – 2n +1
4)
a, =
Ans. Diverges
n-1
5)
=1+(-1)"
Ans. Diverges
Transcribed Image Text:Mathematics Second Year Electrical & Electronic Engineering Department Dr. Atheer Alaa Sabri Exercises on Sequences Find the values of a, a,, a, and a, for the following sequences 1-n 1 a, = n! (-1)*1 1) а, 2) 3) a = %3D 2n -1 2" a, = 2n+1 2" –1 a, 4) an = 2+(-1)" 5) 6) 2" Find a formula for the n" term of the following sequences 1) 1,-1,1,-1,1,.. 2) -1,1,–1,1,-1,.. 3) 1,-4,9,-16,25,... 1 1 1 1 1.- 4'9 5) 0,3,8,15,24,.. 6) - 3,-2,-1,0,1,.. 4) 16 25 7) 1,5,9,13,17,.. 8) 2,6,10,14,18,... 9) 1,0,1,0,1,... Which of the following sequences converge and which diverge? 1) a, = 2+ (0.1)" Ans. Converges, 2 1- 2n 2) a = Ans. Converges, -1 1+2n 1-5n* 3) a, = 4 Ans. Converges, -5 n* + 8n n? – 2n +1 4) a, = Ans. Diverges n-1 5) =1+(-1)" Ans. Diverges
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