SOLUTION: Find the domain of the composite function f o g f(x)= square root x; g(x)= 4x+12

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Question 499431: Find the domain of the composite function f o g
f(x)= square root x; g(x)= 4x+12
Answer by chessace(471) About Me  (Show Source):
You can put this solution on YOUR website!
f(g(x)) = sqrt(4x+12)
Must avoid 4x+12 < 0 or sqrt won't be real.
x < -12/4 = -3
So Domain is (-3, inf)