How do you find the inverse of # f(x) = (x + 2)^2# and is it a function?
1 Answer
Jul 20, 2016
The inverse is a function.
Explanation:
Find the inverse by switching
#y = (x+2)^2#
Switch
#x = (y+2)^2#
Solve for
#sqrtx = sqrt((y+2)^2)#
#sqrtx = y+2#
#sqrtx-2 = y#
#y = sqrtx-2#
The inverse of
#f^-1(x)=sqrtx-2#
The graph of the inverse takes the form of what follows:
graph{sqrt(x)-2 [-10, 10, -5, 5]}
The inverse is a function.