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\(\left(\frac{1}{1\cdot2}+\frac{1}{2\cdot3}+....+\frac{1}{2009\cdot2010}\right)\cdot x=2009\)
\(\left(1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+...+\frac{1}{2009}-\frac{1}{2010}\right)\cdot x=2009\)
\(\left(1-\frac{1}{2010}\right)\cdot x=2009\)
\(\frac{2009}{2010}\cdot x=2009\)
\(x=2009:\frac{2009}{2010}\)
\(x=2010\)
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( 1/1.2 + 1/2.3 + 1/3.4 + 1/4.5 +1/5.6 ) x 10 - x = 0
= ( 1- 1/2 +1/2 -1/3 +1/3 - 1/4 + 1/4 - 1/5 +1/5 -1/6 ) x 10 - x = 0
= ( 1 - 1/6 ) x 10 - x = 0
= 5/6 x 10 - x =0
= 25/3 - x =0
x = 25/3 - 0
x = 25/3
\(\left(\frac{1}{1\times2}+\frac{1}{2\times3}+\frac{1}{3\times4}+\frac{1}{4\times5}+\frac{1}{5\times6}\right)\times10-x=0\)
\(\left(\frac{1}{1}-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+\frac{1}{4}-\frac{1}{5}+\frac{1}{5}-\frac{1}{6}\right)\times10-x=0\)
\(\left(\frac{1}{1}-\frac{1}{6}\right)\times10-x=0\)
\(\frac{5}{6}\times10-x=0\)
\(\frac{25}{3}-x=0\)
x =\(\frac{25}{3}-0=\frac{25}{3}\)
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X x 10 + X + X = 2016
X x ( 10 + 1 + 1 ) = 2016
X x 12 = 2016
X = 2016 / 12
X = 168 k mk , mk sẽ k lại bn
\(x\times10+x+x=2016\)
\(x\times10+x\times2=2016\)
\(x\times\left(10+2\right)=2016\)
\(x\times12=2016\)
\(x=2016:12\)
\(x=168\)
ai k mik mik k lại
ko nói dối
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2016 - x = 2016 + 125
2016 - x = 2141
x = 2016 - 2141
x = -125
Mk nhanh nhất đó
![](https://rs.olm.vn/images/avt/0.png?1311)
12 x 6 x 9 x 87 x 6 = 338256
k cho mình nhé! Mình đang bị âm 17 điểm
\(x+x+x\times2+x\times4+x\times2=2016\)
\(x\times1+x\times1+x\times2+x\times4+x\times2=2016\)
\(x\times\left(1+1+2+4+2\right)=2016\)
\(x\times10=2016\)
\(x=2016\div10\)
\(x=201,6\)
\(x+x+x\times2+x\times4+x\times2=2016\)
\(x\times2+x\times2+x\times4+x\times2=2016\)
\(x\times\left(2+2+4+2\right)=2016\)
\(x\times10=2016\)
\(x=2016:10\)
\(x=201,6\)
ai k cho sakura trường mình khác mình thì mình k lại