1
{2x+1>0⇒2x>-1⇒x>-0,5
{x-1>0⇒x>1
{2x+1нет решения
2
{2-x>0⇒x<2<br>{2-x<1⇒x>1
x∈(1;2)
3
{(4-x)/(x+2)>0 x=4 x=-2 -2{(4-x)/(x+2)<4⇒(4-x-4x-8)/(x+2)<0⇒(5x+4)/(x+2)>0 x<-2 U x>-0,8
x∈(-0,8;4)
4
{31x+2>0⇒x>-2/31
{31x+2≤31⇒31x≤29⇒x≤29/31
x∈(-2/31;29/31]
5
{2x-1>0⇒x>0,5
{x>0
(2x-1)x<1⇒2x²-x-1<0⇒-1/2<x<1<br>D=1+8=9
x1=(1-3)/4=-1/2 U x2=(1+3)/4=1
x∈(1/2;1)