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a) x ∈ {-2;-1;;0;1;2;3}
b) x ∈ {10;11;12}
c) x ∈ {0;1;2;3;4;5}
d) x ∈ {-1;0;1;2}
![](https://rs.olm.vn/images/avt/0.png?1311)
a) – 1 < x < 49 18 => x ∈ {0;1;2}
b) − 1 24 < x 24 < 1 14 => x = 0
c) 2 3 ≤ x ≤ 26 5 => x ∈ {1;2;3;4;5}
d) 0 < x ≤ 1 => x = 1
![](https://rs.olm.vn/images/avt/0.png?1311)
-112 - 56 : x^2 = -126
56 : x^2 = -112 - (-126)
56 : x^2 = 14
x^2 = 56 : 14
x^2 = 4
x = 2
-112 - 56 : x2 = -126
-56 : x2 =-112 -126
- 56 : x2 = - 228
x2 = -228 * -56
x2 = 12768
=> x = \(\sqrt{12768}\)= \(4\sqrt{798}\)
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a) ( 725 + 275 ) : 2 = 1000:2
= 500
b) 1458 x ( 460 + 540 ) = 1458 x 1000
= 1458000
d) (120 + 112 ) + ( 116 + 84 ) = 232 + 200
= 432
725:2+275:2=275
1458x460+1458x540=1458000
52+54+55+56+...+88=2536
120+116+112+84=432
![](https://rs.olm.vn/images/avt/0.png?1311)
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a: \(=-25\cdot4-27=-100-27=-127\)
b: \(=-65:\left(-13\right)-25\cdot4=5-100=-95\)
c: \(=100\cdot\left(-47\right)+53\cdot\left(-100\right)=100\cdot\left(-100\right)=-10000\)
d: \(=\left[\left(-3\right)^{13}:3^{10}-73\right]:\left(-5\right)^2-14\)
\(=\left(-100\right):25-14=-4-14=-18\)
Trl :
107 x 112 - 14 x 56
= 107 x 2 x 56 - 14 x 56
= 214 x 56 - 14 x 56
= ( 214 - 14 ) x 56
= 200 x 56
= 11200
Hok tốt
107 x 112 - 14 x 56
= 107 x 2 x 56 - 14 x 56
= 214 x 56 - 14 x 56
= ( 214 - 14 ) x 56
= 200 x 56
= 11200
#ParkJimin