Question

resolva as seguintes inequaçoes (x +1) (x-1) (x-3) > 0

Answer 1

(x + 1).(x - 1).(x - 3) > 0

p=x+1  ==>x=-1

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

q=x-1  ==>x=1

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

r=x-3 ==>x=3

r------------------------(3)+++++++++++++++++

Estudo de sinais:

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

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

r-----------------------------------------(3)+++++++++++

p*q*r---------(-1)++++(1)-----------(3)+++++++++++

(x + 1).(x - 1).(x - 3) > 0

x<-1  U   -1 > x > 3    é a resposta