Question

Write the relation $R$ = {$x,x^3)$;x is a prime number less than $10$ } in roster form

Answer 1

Step 1 Given
$R$ = {$x,x^3)$;x < 10 is a prime number}

Step 2 Roster form
Prime number less than $10$ are $2,3,5.7$
So, $xϵ$ {2,3,5,7}
R= {(2,8), (3,27), (5,125),(7,343)}