(F•g) pangkat -1 (x) ? jika diket f(x)=2x+11 dan g(x)=1+3x

cari dulu

(f◎g)(x) = 2(1+3x) + 11
= 2 + 6x + 11
= 6x + 13

maka
[tex](fog {)}^{ - 1} (x) = 6x + 13 \\ y = 6x + 13 \\ y - 6x = 13 \\ - 6x = 13 - y \\ x = \frac{13 - y}{ - 6} \\ x = \frac{y - 13}{6} \\ \\ maka \: \\ (fog {)}^{ - 1} (x) = \frac{x - 13}{6} [/tex]