Làm 1 câu tặng 3 k

2 câu 6 k

3 câu 9 k

Nha

Please

a, 2 x 3 x 4 x 5 x 7 x 8 x 25 x 125 = 10 x 100 x 1000 x 3 x 7 = 21000000

19001570.(20052005.2004-20042004.2005

= 19001570.(2005.10001.2004-2004.10001.2005)

= 19001570 . 0=0

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

A=0

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

= - 4 020 023 < âm nha bn >

~~  tk mk đi ~~
Ai tk mk mk tk lại ~~ ^^

ai kb vs mk ik ~~ n_n

1 nha bạn k mk nha

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

dài quá

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

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

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

Rút gọn ta có:

\(=\frac{2003}{2004}x\frac{2003}{2005}x\frac{2004}{2005}\)

\(=\frac{2003x2003x2004}{2004x2005x2005}\)

Giản bước ta được: \(\frac{2003x2003}{2005x2005}\)

Ta có : \(\frac{2003}{2004}\)x\(\frac{200320032003}{200520052005}\)x\(\frac{20042004}{20052005}\)

=          \(\frac{2003}{2004}\)x\(\frac{2003x100010001}{2005x100010001}\)x\(\frac{2004x10001}{2005x10001}\)

=           \(\frac{2003x2003x2004}{2004x2005x2005}\)

=             \(\frac{2003x2003}{2005x2005}\)

Bạn rút gọn hộ mik nhaa !!!

\(\frac{2004}{2005}\) x \(\frac{200520052005}{200320032003}\)x \(\frac{20032003}{20042004}\)= \(\frac{2004}{2003}\) X \(\frac{20032003}{20042004}\)

                                                                                       = 1