Answer:
-3
Step-by-step explanation:
[tex]f\left( x\right) =\sqrt{3x} \ \ \text{and} \ \ g\left( x\right) =x+3[/tex]
it’s clear that :
f is defined if and only if x ≥ 0
Therefore ,
fºg is defined if and only if x + 3 ≥ 0
x + 3 ≥ 0
⇔ x ≥ -3
Then ,the smallest number that is in the domain of fºg is -3
