URGENT PLEASE ANSWER 20 POINTS (inverse function)

Step-by-step explanation:

To find the inverse of a function, begin by switching the places of the 'y' and 'x' variables. Instead of f(x), we will substitute in 'y' for this purpose.

Substitute in 'y':

Swap the 'y' and 'x':

Square both sides:

Simplify:

**Keep in mind, when finding the inverse of a square root function, there is always going to be a restricted domain. In this instance, the restricted domain is  

Step-by-step explanation:

f(x) = √[ x + 3]; find the inverse function.  Here's the procedure:

Replace that "f(x)" with y.  Then y = √[ x + 3]

Next, interchange x and y:     x = √[ y + 3]  =>  x² = y + 3

Next, solve this latest result for y:  y = x² - 3

Finally, replace "y" with the symbol for "inverse of f:"

 -1

f    (x) = x² - 3