f(x) = 3x+6 g(x) = 2x - 10 tentukan (f-10g-1) (x)

f(x) = 3x + 6
x = (y - 6)/3
f⁻¹(x) = (x - 6)/3

g(x) = 2x - 10
x = (y + 10)/2
g⁻¹(x) = (x + 10)/2

(f⁻¹ o g⁻¹)(x) = f⁻¹(x + 10)/2
= ((x + 10)/2 - 6)/3
= (x + 10 - 12)/6
= (x - 2)/6