## anonymous 5 years ago find the domain of the composite function f o g

1. anonymous

$f(x) = \sqrt{x}; g(x) = 5x+25$

2. dumbcow

f(g(x)) = sqrt(5x+25) you cant take the sqrt of neg number so solve 5x + 25 < 0 =>x < -5 so domain of function is x>= -5