Let `A={1,2,3,4,5,6}dot` Let `R` be a relation on A defined by `R={(a , b): a , b in A , b` is exactly divisible by a`}` Write R is roster form Find the domain of `R` Find the range of `Rdot`

Explanation

Given,` A={ 1,2,3,4,5,6 }.`

(i)The roaster form of A is given by,

R= b a { ( a,b ):a,b∈A }
Here b must be exactly divisible by a.

The roaster form of A is given by,

`R={ ( 1,1 ),( 1,2 ),( 1,3 ),( 1,4 ),( 1,6 ),( 2,2 ),( 2,4 ),( 2,6 ),( 3,3 ),( 3,6 ),( 4,4 ),( 6,6 ) }`

(ii)The domain of R is given by,
`R{ 1,2,3,4,6 }`

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