Answer:
-1
f (x) = sqrt(x - 3)
Step-by-step explanation:
Hope you won't mind the correction, but that's y = x^2 + 3. Use " ^ " to indicate exponentiation.
Starting with y = x^2 + 3, interchange x and y:
x = y^2 + 3
Next, solve for y: y^2 = x - 3, or y = +sqrt(x - 3).
Note that we'd normally write "plus or minus sqrt(x - 3)," but that would provide two y values for each x value (which violates the definition of "function').
Finally, replace "y" with the inverse function label:
-1
f (x) = sqrt(x - 3)
