SOLUTION: Find the inverse of the logarithmic function f(x)=-ln(x-2). Steps I've done so far: 1. f(x)=-ln(x-2) 2. y=-ln(x-2) 3. x=-ln(y-2) What is the next step? I am not sure what

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: Find the inverse of the logarithmic function f(x)=-ln(x-2). Steps I've done so far: 1. f(x)=-ln(x-2) 2. y=-ln(x-2) 3. x=-ln(y-2) What is the next step? I am not sure what       Log On


   



Question 374584: Find the inverse of the logarithmic function f(x)=-ln(x-2).
Steps I've done so far:
1. f(x)=-ln(x-2)
2. y=-ln(x-2)
3. x=-ln(y-2)
What is the next step? I am not sure what to do with -ln.
My instructor said the answer is: y=e^-x+2 but I don't know how he gets the -x. I know ln also stands for e.
y=-e^x+2 makes more sense to me.

Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
After x = -ln(y-2):
-x = ln(y - 2). Then raise e to both these powers,
e%5E%28-x%29+=+e%5E%28ln%28y-2%29%29,
e%5E%28-x%29+=+y-2,
e%5E%28-x%29+%2B+2+=+y. This is the inverse function.