Exercício Resolvido de Inequações
c)
\( \dfrac{x+1}{x-1}>0 \)
\[
\frac{\overbrace{x+1}^{A}}{\underbrace{x-1}_{B}}>0
\]
\[
\begin{gathered}
x+1=0\\
x=-1
\end{gathered}
\]
\[
\begin{gathered}
x-1=0\\
x=1
\end{gathered}
\]
\[ \bbox[#FFCCCC,10px]
{V=\left.\phantom{{}}\right]\;-\infty;-1\;\left[\phantom{{}}\right.\;\cup\;\left.\phantom{{}}\right]\;1;\infty \;\left[\phantom{{}}\right.}
\]