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Ai tk mk mk tk lại ~~ ^^

ai kb vs mk ik ~~ n_n

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Giải ra nha các bạn

Lời giải đó

$\left(\frac{20052005}{20062006}-\frac{20042004}{20052005}\right)\cdot 2005\cdot 2006$

=$\left(\frac{2005\cdot 10001}{2006\cdot 10001}-\frac{2004\cdot 10001}{2005\cdot 10001}\right)\cdot 2005\cdot 2006$

=$\frac{2005\cdot 2005\cdot 2006}{2006}-\frac{2004\cdot 2005\cdot 2006}{2005}$

= $2005\cdot 2005-2004\cdot 2006$

=${}^{}-\left(2005-1\right)\cdot \left(2005+1\right)$

=${}^{}-{}^{}+1$

=1

\(\left(\frac{20052005}{20062006}-\frac{20042004}{20052005}\right)\cdot2005\cdot2006\)

=\(\left(\frac{2005\cdot10001}{2006\cdot10001}-\frac{2004\cdot10001}{2005\cdot10001}\right)\cdot2005\cdot2006\)

=\(\frac{2005\cdot2005\cdot2006}{2006}-\frac{2004\cdot2005\cdot2006}{2005}\)

= \(2005\cdot2005-2004\cdot2006\)

=\(2005^2-\left(2005-1\right)\cdot\left(2005+1\right)\)

=\(2005^2-2005^2+1\)

=1

\(\left(\frac{20052005}{20062006}-\frac{20042004}{20052005}\right)x2005x2006\)

\(=\left(\frac{2005x10001}{2006x1001}-\frac{2004x10001}{2005x10001}\right)x2005x2006\)

\(=\left(\frac{2005}{2006}-\frac{2004}{2005}\right)x2005x2006\)

\(=\frac{2005x2005x2006}{2006}-\frac{2004x2005x2006}{2005}\)

\(=2005x2005-2004x2006\)

\(=2005x2005-\left(2005-1\right)x2006\)

\(=2005x2005-2005x2006+2006\)

\(=1\)

cảm ơn bạn tíntiếnngân nha nhưng hình nhữ cách làm của bạn bị sai rồi nha

\(\frac{2006\times2006\times20052005-2005\times2005\times20062006}{2005\times20042004}\)

\(=\frac{2006\times2006\times2005\times10001-2005\times2005\times2006\times10001}{2005\times2004\times10001}\)

\(=\frac{2006\times10001\times2005}{2005\times2004\times10001}=\frac{1003}{1002}\)

\(\frac{20042004\cdot2006}{20062006\cdot2006}=\frac{2004\cdot10001\cdot2006}{2006\cdot10001\cdot2006}=\frac{1002.1.1}{1003.1.1}=\frac{1002}{1003}\)

M = N

vì: 20052005 < 200520052005 nhưng 200620062006 > 20062006

A=2005*2004*10001-2004*2005*10001

A=0

a = 2005 x 2004 x 1001 - 2004 x 2005 x 1001  =0