Question

A relation R defined on N the set of natural no. Is given by R={(a,b):b=a+8,a<4 and a,b elements N} write Domain of R and Range of R

Answer 1

We have to consider only natural number

as it is given that will relation is defined

only on natural numbers and also it is

given that is a is less than 4 so we have

only natural a value of a ={1,2,3}

b=8+a
when a= 1 then b=9
a= 2 then b = 10
a=3 then b =11

So we have relation (1,9) (2,10) (3,11)

Domain ={1,2,3}
Range= {9,10,11}