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![](https://rs.olm.vn/images/avt/0.png?1311)
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\(352-x+3^{\text{ 4 }}=422\)
\(352-x+81=422\)
\(352-x=422-81\)
\(352-x=341\)
\(x=352-341\)
\(x=11\)
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![](https://rs.olm.vn/images/avt/0.png?1311)
\(4^{20}+4^{21}+4^{22}+4^{23}=4^{20}\left(1+4+4^2+4^3\right)=4^{20}\cdot85⋮5\left(85⋮5\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có :
TH1 : \(x< -4;\)ta có :
\(Q=\left[-\left(x-3\right)\right]+\left[-\left(x+4\right)\right]+x-5\)
\(=3-x-x-4+x-5\)
\(=-6-x\)
TH2 : \(-4\le x< 3;\)ta có :
\(Q=\left[-\left(x-3\right)\right]+\left(4-x\right)+x-5\)
\(=3-x+4-x+x-5\)
\(=2-x\)
TH3 : \(x\ge3;\)ta có :
\(Q=\left(x-3\right)+\left(4+x\right)+x-5\)
\(=x-3+4+x+x-5\)
\(=3x-4\)
![](https://rs.olm.vn/images/avt/0.png?1311)
666 - (-422)-100 - 88
= 666 + 422 - 100 - 88
= ( 666 - 100 ) + ( 422 - 88 )
= 566 + 334
= 900
- ( - 315 ) -( -115 ) - 125 +25
= 315 + 115 - 125 + 25
= ( 315 + 25 ) + ( 115 - 125 )
= 340 + ( - 10 )
= 330
=243+4567+1+574+4
=4810+1+574+4
=4811+574+4
=5385+4
=5389