SOLUTION: Find the domain of the composite function. f(x)=square root of x ; g(x)=2x-5 Please help me with the above question for I have no idea on how to go about it. Thank you!!

Algebra ->  Functions -> SOLUTION: Find the domain of the composite function. f(x)=square root of x ; g(x)=2x-5 Please help me with the above question for I have no idea on how to go about it. Thank you!!      Log On


   

Question 620518: Find the domain of the composite function.
f(x)=square root of x ; g(x)=2x-5
Please help me with the above question for I have no idea on how to go about it.
Thank you!!
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

f(x) sqrt%28x%29  and g(x) = 2x+5

f(g(x)) = sqrt%282x%2B5%29      || the composite function

 For f(g(x)) to be a Real Number :  2x+5  ≥ 0   or x  ≥ -5/2