Question

If f(x) = 1/9x-2 , what is f–1(x)?

Answer 1

It could be like that i think f (-1) or x=-1
And f (-1) =-1/9 -2
f (-1)=-19/9

Answer 2

f(x) = 1/9x - 2

Find f⁻¹(x):

Let f(x) = y

y = 1/9x - 2

9y = x - 18

x = 9y + 18

Replace y with x:

f⁻¹ (x) = 9x + 18

Answer:f⁻¹ (x) = 9x + 18