1) 2(x+5)<2-2x
3(2-x)=>3-x
_
2x+10<2-2x
6-3x=>3-x
2x+2x<-10
-3x+x=>3-6
4x<-10 |:4 -------> x<-10\4, x<-5\2, x<-2.5
-2x=>-3 | :(-2) ------->x<=3\2, x<=1.5
Теперь рисуем:
\\\\\\\\\\\\\
-∞________-2.5____1.5___
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
xє(-∞;-2.5)
2) 3(x+8)>9-2x
3(x+4)=>x+5
3x+24>9-2x
3x+12=>x+5
3x+2x>9-24
3x-x=>5-12
5x>-15 |:5 , x>-15\5 , x>-3
2x=>-7 |:2 , x=>-7\2, x>-3.5
рисуем:
///////////////
-∞____-3.5___-3__ + ∞
///////////
xє(-3;+∞)
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
1) 2(x+5)<2-2x
3(2-x)=>3-x
_
2x+10<2-2x
6-3x=>3-x
_
2x+2x<-10
-3x+x=>3-6
_
4x<-10 |:4 -------> x<-10\4, x<-5\2, x<-2.5
-2x=>-3 | :(-2) ------->x<=3\2, x<=1.5
Теперь рисуем:
\\\\\\\\\\\\\
-∞________-2.5____1.5___
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
xє(-∞;-2.5)
2) 3(x+8)>9-2x
3(x+4)=>x+5
_
3x+24>9-2x
3x+12=>x+5
_
3x+2x>9-24
3x-x=>5-12
_
5x>-15 |:5 , x>-15\5 , x>-3
2x=>-7 |:2 , x=>-7\2, x>-3.5
рисуем:
///////////////
-∞____-3.5___-3__ + ∞
///////////
xє(-3;+∞)