Question

Fungsi f (x + 2) = 2x - 1. Jika f(p) = -9, nilai p adalah...

Answer 1

F(x+2) = 2(x +2) - 1
         = 2x + 4 - 1
          = 2x + 3
maka
f(p) ⇒ 2x + 3 = -9
             2x  = -9 - 3
             2x  = -12
               x  = -6

Answer 2

= 2.(x+2)-1 = -9
   2x + 4 -1 = -9
   2x + 3 = -9
   2x = -9 -3
   2x = -12
     x = -12 / 2
     x = -6

jadi = 2(-6+2)-1 = -9
        2 x -4 -1 
       -8 -1 = -9