SOLUTION: find the f-1 for function f(x)= (e^-x) +5

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Question 381788: find the f-1 for function
f(x)= (e^-x) +5
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
y=e%5E%28-x%29%2B5
Interchange x and y and solve for the new y, that's the inverse.
x=e%5E%28-y%29%2B5
e%5E%28-y%29=x-5%0D%0A%7B%7B%7B-y=ln%28x-5%29
y=-ln%28x-5%29
highlight%28f%5E%28-1%29=-ln%28x-5%29%29