Let R_{1} and R_{2} be relations on the set { 1,2,...,50} such that R_{1} = { ( p,p^{n} ):p is a prime and n ? 0 is an integer } and R_{2} = { ( p,p^{n} ):p is a prime and n = 0 or 1}. Then, the number of elements in R_{1} - R_{2} is .: Relation (Mathematics) Question | DivineJEE

Let R_{1} and R_{2} be relations on the set { 1,2,...,50} such that R_{1} = { ( p,p^{n} ):p is a prime and n ? 0 is an integer } and R_{2} = { ( p,p^{n} ):p is a prime and n = 0 or 1}. Then, the number of elements in R_{1} - R_{2} is .: Relation (Mathematics) Question | DivineJEE | divineJEE