dik : f (x) = 2x + a g (x) = 4x - b jika f(1) = 1 dan g(-1) = 2 maka a+ b

Fungsi
SMP Kelas VIII

f(x) = 2x + a
f(1) = 1
2(1) + a = 1
2 + a = 1
a = 1 - 2
a = -1

g(x) = 4x - b
g(-1) = 2
4(-1) - b = 2
-4 - b = 2
-b = 2 + 4
-b = 6
b = -6

a + b = -1 + (-6)
         = -7

f(1)=1
2(1)+a=1
2+a=1
a=-1
g(-1)=2
4(-1)-b=2
-4-b=2
-6=b
a+b=-1-6=-7