Question

If f(x) = x plus 2, all over 2, then what is f-1(x) ?

Answer 1

Switch the variables. Call f(x) y. So y = (x+2)/2 becomes x = (y+2)/2. Solve for y. Here, you get y = 2x - 2.

Answer 2

then the inverse is x = (f(x)+2)/2
solve for f(x)

2x = f(x) + 2
f(x) = 2x - 2
so u get 2x – 2

Answer 3

okay, thanks!