SOLUTION: Find the inverse of the function. IF the function does not have inverse write NO INVERSE. f(x) = –2x – 4 f^-1(x)= ?

Algebra ->  Functions -> SOLUTION: Find the inverse of the function. IF the function does not have inverse write NO INVERSE. f(x) = –2x – 4 f^-1(x)= ?      Log On


   

Question 863282: Find the inverse of the function. IF the function does not have inverse write NO INVERSE.
f(x) = –2x – 4

f^-1(x)= ?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Switch to x,y notation,
y=-2x-4
Interchange x and y and solve for y.
This "new" y is the inverse.
x=-2y-4
x%2B2y=-4
2y=-x-4
y=-%28x%2B4%29%2F2
highlight%28f%5E%28-1%29%28x%29=-%28x%2B4%29%2F2%29