Jawablah dengan benar

a. R = {2,3,4,5,6,7,8,9}
b. Himpunan pasangan berurutan
HP = {(2,2); (2,3); (2,4)(2,5); (2,6)(2,7); (2,8)(2,9); (3,1)(3,2);(3,3);(3,4); (3,5)(3,6); (3,7)(3,8); (3,9)(4,2); (4,3);(4,4); dan seterusnya sampai (9,9)}
c. F {2} = 1
F {3} = 4
F {4} = 8 
F {5} = 10
F {6} = 13
F {7} = 16
F {8} = 19
F {9} = 22
d. F {2x-1} = 3x-5
                  = 3 (2x-1) - 5
                  = 6x - 3 -5
                  = 6x - 8