SOLUTION: find the domain of the composite function fog f(x)= x^2+8; g(x)= sqrt.x-1

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: find the domain of the composite function fog f(x)= x^2+8; g(x)= sqrt.x-1      Log On


   

Question 630003: find the domain of the composite function fog
f(x)= x^2+8; g(x)= sqrt.x-1
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
find the domain of the composite function fog
f(x)= x^2+8; g(x)= sqrt.x-1
-----
fog = f[g(x)] = f[sqrt(x-1)] = (x-1)+8 = x+7
-----
Domain: All Real Numbers >= 1.
===============================
Cheers,
Stan H.