ers; addition Yes

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Question
16
Is the set of numbers described belowa group under the given operation?
Integers; addition
Yes
No
Transcribed Image Text:Is the set of numbers described belowa group under the given operation? Integers; addition Yes No
Expert Solution
Step 1

the set of integers under addition must satisfy following properties to be a group 

1. closure property

the addition of two integers is again a integer, therefore closure property is satisfied.

2. Associative property 

let a,b,cZ where Z is set of integers

Therefore a+b+c=a+b+c

the associative property also holds true, 

3. Existence of identity 

0 is the identity element 

4. Existence of inverse. 

for an element aZ, the inverse is -a

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