Rozwiąż:
a) |2x|<9
b) |x+2|<1
c) |3y+5|<4
d)|x+3+>3
e) |4z+1|>5
f)|3-5x|-2>0
dziękuje ;))
a)2x<9 , 2x>-9
2x<9 /:2 , 2x>-9 /:2
x<3 x>-3
b)x+2<1 , x+2>-1
x<-1 , x>-3
c)3y+5<4 , 3y+5>-4
3y<-1/:3 , 3y>-9/:3
y<-1/3 , y>-2
d)x+3>3 , x+3<-3
x>0 , x<-6
e)4z+1>5 , 4x+1<-5
4z>4/:4 , 4x<-6/:4
z>1 , x<-3/2
f)I3-5xI>2
3-5x>2 i 3-5x<-2
-5x>-1/:(-5) i -5x<-5/:(-5)
x<1/5 i x>1
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a)2x<9 , 2x>-9
2x<9 /:2 , 2x>-9 /:2
x<3 x>-3
b)x+2<1 , x+2>-1
x<-1 , x>-3
c)3y+5<4 , 3y+5>-4
3y<-1/:3 , 3y>-9/:3
y<-1/3 , y>-2
d)x+3>3 , x+3<-3
x>0 , x<-6
e)4z+1>5 , 4x+1<-5
4z>4/:4 , 4x<-6/:4
z>1 , x<-3/2
f)I3-5xI>2
3-5x>2 i 3-5x<-2
-5x>-1/:(-5) i -5x<-5/:(-5)
x<1/5 i x>1