jika f(x)=2x+5/x-1 dan g(x)=x-4 maka nilai (fog)(-2)!

f(x) = (2x + 5)/(x - 1)
g(x) = x - 4

Ditanya (f o g) (-2)

Jawaban :

➡Tentukan nilai fungsi (f o g) (x)

(f o g) (x) = f(g(x)) = f(x - 4)

(f o g) (x) = (2(x -4) + 5)/(x - 4) - 1

(f o g) (x) = (2x - 3)/(x -5)


Maka nilai (f o g) (-2)
= (2(-2) - 3) / (-2 -5)

= -7 / - 7

= 1 ✔