Answer to Question #170293 in Discrete Mathematics for Rafia Humeri

Question

define the relation on A={1,2,3} such that aRea of a=b+1 and find it's domain and range

Answer 1

A= {1,2,3}

R= {(a,b):a=b+1}

Here, a=b+1

$\Rightarrow$ b=a-1

So,

When, a=1, b=0

a=2, b=1

a=3, b=2

Now, R= { (1,0), (2,1), (3,2) }

Domain = {1,2,3}

Range = {0,1,2}