ANSWER
The elements in both sets is written as
[tex]R\cap D=[/tex] [tex]3,9,15[/tex]
EXPLANATION
The first set is
R={[tex]1,2,3,5,7,9,11,13,15,17[/tex]}.
The second equation is
[tex]D=[/tex]{[tex]3,6,9,12,15,18,21,24,18,27[/tex]}.
The intersection of the two sets denoted by [tex]R\cap D[/tex] are the elements that are found in set R that are also in set D.
These elements are 3,9 and 15.
So we write
[tex]R\cap D=[/tex] [tex]3,9,15[/tex]
Note that when there is no element in common to both sets, then the intersection is the null set, {[tex]\emptyset[/tex]}.
