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