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Niiiiiiiiiiiiiiiiiii
@Niiiiiiiiiiiiiiiiiii
September 2021
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Помогите решить задания с 159 по 170,вообще не получается
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alisher0901
159.
-x2+2x-1
⩾ 0
D=4-4*(-1)*(-1)=0
x
⩾
-2/-2
x
⩾
1
(1;+
∞)
160.
-x2+4x-4<0
D=16-4*(-1)*(-4)=0
x<-4/-2
x<2
[-
∞;2]
161.
4x2+4x+1>0
D=16-4*4=0
x>-4/8
x>-0.5
[-0.5;+∞]
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Answers & Comments
-x2+2x-1⩾ 0
D=4-4*(-1)*(-1)=0
x⩾ -2/-2
x⩾ 1
(1;+∞)
160.
-x2+4x-4<0
D=16-4*(-1)*(-4)=0
x<-4/-2
x<2
[-∞;2]
161.
4x2+4x+1>0
D=16-4*4=0
x>-4/8
x>-0.5
[-0.5;+∞]