F=(1, 2),(0,-1),(3,5),4,7) g=(-1,0),)1,3),(5,1),(4,9) tentukan gof

jawab

gof(x) =  g { f(x)} = 

f(x) --> g(x)  
(1.2)--> (2, Ф)
(0,-1)--> (-1, 0)
(3,5) --> (5, 1)
(4,7)---> (7. Ф)

gof(x) = { (1, Ф) , (0,0), (3, 1), (4, Ф) }