Jawabanmu

2014-09-06T18:50:13+07:00
(fog)(x)=f(g(x))
=4(3x-5)+1
=12x-19
(fog)(2)=12(2)-19
         = 5

(gof)(x)= g(f(x))
=3(4x+1) - 5
=12x - 2

(gof)(-1)= 12(-1) - 2
= -14