試題詳解

複選題
3. Suppose we have two functions fand g, withf(1)=3,f(2)=1,f(3)=4,f(4)=6, g(1)=5,g(2)=3,g(3) =4,g(4)=1,g(5) =3,and g(6) = 2. Which is the correct mapping of the composite function g o f?
(A) go f(1) = 5；
(B) go f(2) = 3；
(C) go f(3) = 1；
(D) g o f(4) = 6.