SOLUTION: For f(x) = x + 10 find (f o f^-1)(5) A. 5 B. all real numbers C. 0 D. x

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: For f(x) = x + 10 find (f o f^-1)(5) A. 5 B. all real numbers C. 0 D. x      Log On


   

Question 762503: For f(x) = x + 10 find
(f o f^-1)(5)
A. 5

B. all real numbers

C. 0

D. x
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x%29+=+x+%2B+10.....first find f%5E-1%28x%29
f%5E-1%28x%29=x-10
%28f+o+f%5E-1%29%28x%29=x-10%2B10=x
then
%28f+o+f%5E-1%29%285%29=5
so, answer is A.+5