tolong bantuannya ya

Bab Fungsi

Cari dulu (f o g)(x)
(f o g)(x)
= f(g(x))
= f(3x + 4)
= (3x + 4 + 1)/(3x + 4 - 5)
= (3x + 5)/(3x - 1)

y = (3x + 5)/(3x - 1)
y(3x - 1) = (3x + 5)
3xy - y = 3x + 5
-y - 5 = 3x - 3xy
-(y + 5) = x(3 - 3y)
x = -(y + 5)/-(3y - 3)
(f o g)^-1(x) = (x + 5)/(3x - 3)