jika f(x-3)=2x-4 nilai f1 (x)brapa ya?!

Substitusi x = y+3

Maka fungsi menjadi :
f(y) = 2(y+3)-4
=2y + 6 - 4
=2y + 2

f(x) = 2x + 2

f(x-3)=2x-4
misal : x-3 = p
             x    = p + 3 diganti ( x + 3)
f(x)=2( x + 3 )-4
     = 2x+6-4
 f1(x)= 2x+2
y       = 2x+2
y-2    = 2x
y-2/2 = x
x-2/2 = f1(x)