Jawabanmu

2014-04-13T14:39:25+07:00
2014-04-13T15:17:37+07:00
F{x} =3x+10
f{-1} =a
3(-1) + 10 = a
-3 + 10 = a
7 = a 

f{b} = 2
3b + 10 = -2
3b = -12
b = -4

maka a 
≠ b atau b < a