264 : (22-3x)=66
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34.66 - 34.4 - 66.34 - 66.4
= ( 34.66 - 66.34) - ( 34.4 +66.4)
= 0 - 4.(34+66)
= -4.100
= -400
\(34.\left(66-4\right)-66.\left(34+4\right)\\ =34.66-34.4-66.34-66.4\\ =\left(34-34-4\right).66-34.4\\ =-4.66-34.4\\ =4.\left(-66\right)-34.4\\ =4.\left(-66-34\right)\\ =4.\left(-100\right)\\=-400\\ -264.\left(-400\right).264.40\\ =264.400.264.40\\ =264.4.100.264.4.10\\ =264.4.264.4.\left(100.10\right)\\ =\left(264.4\right)^2.1000\\ =1115136.1000=1115136000\)
`1+2+2^2+2^3+....+2^63`
`=2+2+2^2+2^3+....+2^63-1`
`=2.2+2^2+2^3+....+2^63-1`
`=2^2+2^2+2^3+....+2^63-1`
`=2.2^2+2^3+....+2^63-1`
`=2^3+2^3+...2^63-1`
`=2.2^3+....+2^63-1`
`=2^4+....+2^63-1`
`=2^{63}.2-1=2^64-1`
\(22+78+22+33+44+88+66+100\)
\(=\left(22+78\right)+\left(22+88\right)+\left(44+66\right)+33+100\)
\(=100+110+110+33+100\)
\(=453\)
a: A=(100-99)(100+99)+(98-97)(98+97)+...+(2-1)(2+1)
=100+99+98+...+2+1
=5050
b: \(B=\left(2^2-1\right)\left(2^2+1\right)\left(2^4+1\right)\cdot...\cdot\left(2^{64}+1\right)+1\)
\(=\left(2^4-1\right)\left(2^4+1\right)\cdot...\cdot\left(2^{64}+1\right)+1\)
\(=\left(2^8-1\right)\left(2^8+1\right)\cdot...\cdot\left(2^{64}+1\right)\)+1
\(=2^{64}-1+1=2^{64}\)
11+22=33
22+33=55
33+44=77
44+55=99
55+66=121
66+77=143
77+88=165
88+99=187
99+100=199
11+22=33
22+33=55
33+44=77
44+55=99
55+66=121
66+77=143
77+88=165
88+99=187
99+100=199
chúc bn hok tốt
tk+kb vs mk nha m.n!
c.ơn m.n nhìu!
264: ( 22 - 3x ) = 66
( 22 - 3x ) = 264 : 66
( 22 - 3x ) = 4
3x = 22 - 4
3x = 18
x = 18: 3
x = 6
`264 : (22-3x)=66`
`22-3x=264:66`
`22-3x=4`
`3x=22-4`
`3x=18`
`x=18:3`
`x=6`
Vậy `x=6`