1.Let R1R_1R1 and R2R_2R2 be relations on the set {1,2,…,7}\{1, 2, \ldots, 7\}{1,2,…,7} such that R1={(p,pn):p is a prime and n≥0 is an integer}R_1 = \{(p, p^n) : p \text{ is a prime and } n \ge 0 \text{ is an integer}\}R1={(p,pn):p is a prime and n≥0 is an integer} and R2={(p,pn):p is a prime and n=0 or 1}R_2 = \{(p, p^n) : p \text{ is a prime and } n = 0 \text{ or } 1\}R2={(p,pn):p is a prime and n=0 or 1}. Then the number of elements in R1−R2R_1 - R_2R1−R2 isa.000b.111c.222d.444Login to continueOnly logged in users canattempt or see the solution.
