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aigerim122
@aigerim122
June 2021
2
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Теңсіздікті шешіңіз
[tex]1) \: 7 \leqslant 2x + 3 \leqslant 11[/tex]
[tex]2) \: - 3 < 1 + 2x \leqslant 7[/tex]
[tex]3) \: - 2 < \frac{8 + x}{7} < 4[/tex]
[tex]4) \: - 7 \leqslant \frac{2x + 1}{2} < 2[/tex]
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sedinalana
1
7≤2x+3≤11
4≤2x≤8
2≤x≤4
x∈[2;4]
2
-3<1+2x≤7
-4<2x≤6
-2<x≤3
x∈(-2;3]
3
-2<(8+x)/7<4
-14<8+x<28
-22<x<20
x∈(-22;20)
4
-7≤(2x+1)/2<2
-14≤2x+1<4
-15≤2x<3
-7,5≤x<1,5
x∈[-7,5;1,5)
2 votes
Thanks 4
aigerim122
Спс
ПрофиЗнания
1) 7≤2x+3≤11
7-3≤2x
≤11-3
4
≤2x
≤8
2
≤x
≤4
2)-3<1+2x
≤7
-3-1<
2x
≤7-1
-4<
2x
≤6
-2<x
≤3
3)-2< 8+x/7<4
-2*7<8+x<4*7
-14<8+x<28
-14-8<x<28-8
-22<x<20
4)-7
≤2x+1/2 <2
-14
≤2x+1<4
-15
≤2x<3
-7,5
≤x<1,5
0 votes
Thanks 5
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Answers & Comments
7≤2x+3≤11
4≤2x≤8
2≤x≤4
x∈[2;4]
2
-3<1+2x≤7
-4<2x≤6
-2<x≤3
x∈(-2;3]
3
-2<(8+x)/7<4
-14<8+x<28
-22<x<20
x∈(-22;20)
4
-7≤(2x+1)/2<2
-14≤2x+1<4
-15≤2x<3
-7,5≤x<1,5
x∈[-7,5;1,5)
7-3≤2x≤11-3
4≤2x≤8
2≤x≤4
2)-3<1+2x≤7
-3-1<2x≤7-1
-4<2x≤6
-2<x≤3
3)-2< 8+x/7<4
-2*7<8+x<4*7
-14<8+x<28
-14-8<x<28-8
-22<x<20
4)-7≤2x+1/2 <2
-14≤2x+1<4
-15≤2x<3
-7,5≤x<1,5