Question

Resolva as ineguaçoes em R x+1/x-1 <0

Answer 1

(x+1)/(x-1) <0

p=x+1  ...raiz ==>x+1=0  ==>x=-1

p------------------(-1)++++++++++++++++++

q=x-1  ...raiz ==>x-1=0  ==>x=1

q------------------(1)++++++++++++++++++

Estudo de sinais:

p------------------(-1)++++++++++++++++++++++++++
q----------------------------------(1)++++++++++++++++++
p/q+++++++++(-1)-----------(1)+++++++++++++++++

-1< x < 1  ou (-1,1)  é a resposta