dik f(×)=3-2× dan g(×)=7×+4 Tentukan (fog)-1(×]

Mapel : Matematika

Kelas : 10

Bab : Fungsi Invers
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(f o g) (x) = f(7x + 4)

(f o g) (x) = 3 - 2(7x + 4)

(f o g) (x) = 3 - 14x - 8

(f o g) (x) = -11 - 14x


Misalkan :

-11 - 14x = y

-14x = y + 11

x = (y + 11)/-14


Maka, fungsi inversnya :

(f o g) -¹(x) = (x + 11)/-14 ✔