Question

ergresg

Answer 1

Do you mean f^(-1)(x)?

Answer 2

1. Replace f(x) with y
2. Switch x and y
3. Solve for y
4. Replace x with 4 and find y

Answer 3

Why didn't you do Step 2?

Answer 4

y=2x+2
Put x where y is
Put y where x is
That's what switching x and y means.

Answer 5

x=2y+2

Answer 6

Now solve it for y

Answer 7

x=2y+2
SOLVE THAT FOR y