Jawabanmu

2014-05-03T19:33:12+07:00
f(-5) = -5a + b = 15
f(5) = 5a + b = -5
cari a : caranya pake rumus eliminasi
-10a = 20
a = -2

cari b : 5a + b = -5
           5(-2) + b = -5
           -10 + b = -5
                    b = 5

f(1) = a + b
         -2 + 5 = 3
1 5 1