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viktoriaviktoriaua
@viktoriaviktoriaua
August 2021
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Помогите пожалуйста № 63(а) , 65 , 66(є) !
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kirichekov
Verified answer
63 a. 7-21х<0, -21x<-7, x>-21/(-7)
x>3
66 э. 4x/3+(x+2)²>(x-3)²-2x/3
4x/3+2x/3+x²+4x+4-x²+6x-9>0
(4x+2x)/3+10x-5>0
2x+10x-5>0, 12x-5>0, 12>5, x>12/5
x>2,4
65 a. (2x-1)/2+(3x-3)/5>x |*10
((2x-1)/2)*10+((3x-3)/5)*10>x*10
(2x-1)*5+(3x-3)*2>10x
10x-5+6x-6-10x>0
6x-11>0, 6x>11,
x>11/6
65.б (y-2)/4-(y+6)/3<2y |*12
(y-2)*3-(y+6)*4<24y
3y-6-4y-24-24y<0, -21y-30<0, -21y<30, y>30/(-21)
y>-10/7
1 votes
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Answers & Comments
Verified answer
63 a. 7-21х<0, -21x<-7, x>-21/(-7)x>3
66 э. 4x/3+(x+2)²>(x-3)²-2x/3
4x/3+2x/3+x²+4x+4-x²+6x-9>0
(4x+2x)/3+10x-5>0
2x+10x-5>0, 12x-5>0, 12>5, x>12/5
x>2,4
65 a. (2x-1)/2+(3x-3)/5>x |*10
((2x-1)/2)*10+((3x-3)/5)*10>x*10
(2x-1)*5+(3x-3)*2>10x
10x-5+6x-6-10x>0
6x-11>0, 6x>11, x>11/6
65.б (y-2)/4-(y+6)/3<2y |*12
(y-2)*3-(y+6)*4<24y
3y-6-4y-24-24y<0, -21y-30<0, -21y<30, y>30/(-21)
y>-10/7