Question

Let f(x) = 2x - 6 Solve f-1(x) when x = 2

Answer 1

is it f^-1 or (f-1)(x)

Answer 2

if it is f^-1 (x)
f(x) = 2x- 6 so we have to find the inverse equation we get
y= 2x-6 interchange x and y and make x the subject of the formula
x= 2y-6
(x+6)/2 = y our new equation now to find f^-1(x) just insert x which is 2
(2+6)/2 = y
8/2= f^-1(x)
4= f^-1 (x)