Question

Sendo u=Q resolva as inequações :(x+2)+(x+3)+(x+4) menor ou igual 1

Answer 1

Resposta:

A)

(x+2)+(x+3)+(x4)<1. 

x+2+x+3+4x<1

6x+5<1

6x<1-5

6x<-4

6x/6<-4/6

x<-2/3

S={x∈Q/x<-2/3} o Q representa o conjunto dos racionais. Lembra do traço

b)

4-2x >3-3x

-2x>-4+3-3x

-2x+3x>-1

x>-1

S={x∈Q/x>-1}

c)

x-5<1-x

x<5+1-x

x+x<6

2x<6

2x/2<6/2

x<3

S={X∈Q/x<3}