Question

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

Answer 1

To find the inverse of f(x) = 2x - 6, then let ƒ(x) be y, i.e.
y = 2x - 6

Make x the subject of formula by adding 6 to both sides and then dividing by 2, which you'll have
(y + 6)/2 = x

the x & y variables to get the inverse of y, then
(x + 6)/2 = y

Remember that f(x) is y, so also the inverse of y is f-1(x), then
f-1(x) = (x + 6)/2, where x = 2, you'll have
f-1(2) = (2 + 6)/2
f-1(2) = 8/2
f-1(2) = 4

Answer 2

Thankyou.

Answer 3

My Pleasure.