Question

Obtenha o domínio de cada função 
a) f(x) = 9x+3 
b) g(x) = x³+8x_x+3
c) (x)= raiz x-8
d) j(x)= raiz x-1_x-3

Answer 1

$a) D(f)=R \\ b) D(f)=R \\ c) D(f)=\{x \in R | x\geq8\} \\ d)D(f)=\{ x \in R |x>3 \}$