Jawabanmu

2014-04-28T13:03:02+07:00
F (x) = 3x + n
f (-1) = 3. -1 + n = 7
       = -3+n = 7
n = 7 +3 + 10

f (5) = 3. 5 + 10 = 25
f (1) = 3.1 + 10 = 13
f (5) + f (1) = 25+13 =38
2014-04-28T13:04:22+07:00
F(x)= 3x+n
f(-1)= 7
f(-1)= 3(-1) +n= 7
-3 + n= 7, n= 7-(-3)= 10
f(5)= 3(5) +10= 25
f(1)= 3(1) + 10= 13