Question

If f(x) = 9x-8, which of the following is the inverse of f(x)?

O A. f'(x) = *19
O B. f'(x) = x;
O c. f-'(x) = 48
X-9
O D. f-1(x) =
8

Answer 1

f(x) = 9x+8
y = 9x+8
x = 8y + 9
x-9 = 8y

x-9
----- = y
8

f-¹ =
x-9
------
8