Question

Encontre o dominio das funções:

A) $f(x)= \sqrt[3]{ x^{2} -5}$

 

B)$<var>f(x)=\sqrt{2x+1}</var>$

 

C)$<var>f(x)=\frac{2x+3}{\sqrt{1-x}}</var>$

 

D)g(x)$<var>g(x)=\frac{x}{x+1}</var>$

 

E)$<var>f(x)=\frac{1}{\sqrt[3]{x+1}}</var>$

 

Answer 1

$a) D(f)=\{x \in R/x\leq \sqrt-5 \ ou \ x\geq \sqrt5\} \\ \\ b) D(f)=\{x \in R/x\geq -\frac{1}{2} \} \\ \\ c) D(f)=\{x \in R / x< -1 \} \\ \\ d) D(g)=R-\{-1\} \\ \\ e)D(f)=\{x \in R /x>1 \}$