Jika f(x) =√x dan g(x) =x²+1, maka (g o f of) (x) =

1. cari gof(x):

gof(x) = g(f(x))

gof(x) = g(√x)

gof(x) = (√x)²+1

gof(x) = x+1

2. hitung (gofof)(x):

(gofof)(x) = (gof)(f(x))

(gofof)(x) = (gof)(√x)

(gofof)(x) = √x + 1

jawabannya C