Jawabanmu

2014-03-19T22:39:06+07:00
dik: f(x)=x²+x-12
      g(x)=x+4
a.(f+g)(x)=
x²+x-12+x+4=x²+2x-8
b.(f+g)(1)=
(1)²+2(1)-8=1+2-8=-5
c.(f/g)(x)=
x²+x-12:x+4=(x-3)(x+4):(x+4)=(x-3)
d.(f+g)(4)=
(4)²+2(4)-8=16+8-8=16