If R = {(1, 2), (1, 4), (2, 3), (3, 1), (4, 2)}, what is the reflexive closure of R? O {(1, 2), (2, 1), (1, 4), (4, 1), (2, 3), (3, 2), (3, 1), (1, 3), (4, 2), (2, 4)} O {(1, 1), (1, 2), (1, 4), (2, 2), (2, 3), (3, 1), (3, 3), (4, 2), (4, 4)}

Let A₁ = {1, 3, 5, 7, 9, 11), A₂ = {-2, 6, 9, 11}, A3 = {-2, 4, 6, 9, 11}. Show that a. A₁ + A₂=(A₁ - A₂) U (A₂-A₁) b. A₁ U (A₂ NA3)=(A₁ UA₂) N (A₁ UA3)

8. Given the set B={2,3,4} such that (a,b) are the two numbers having the same parity therefore R2 is. R2=((2,2), (2,4),(4,2), (4,4),(3,3) R2={(3,3), (4,4), (1,1), (3,2)} R2=(0,0), (2,2),(3,2), (4,2)} R2=(1,0),(1,2), (3,3), (3,2) 9. Given set A={1,4,5) B={2,4, 8} such that a/b on the set of natural nuber if and only if there is some elements of natural numbers aRb={(4,2), (4,4), (4,8)) aRb={(4,2), (4,5), (4,4)} aRb=((4,2), (4,4), (4,6)} aRb=(4,2), (4,1), (4,3))

Let U= {1,2,3,4,5,6,7,8,9}  A= {2,4,6,8}  B= {1,2,3,4} and C= {5,7,9}  Give a set, D, that is equivalent to C, but not equal to C.  I am confused on the difference and how to proceed with this.