Question

Tính nhanh:

\(\frac{2005\cdot2007-1}{2004+2005\cdot2006}\)

. là dấu nhân

Answer 1

\(\frac{2005.2007-1}{2004+2005.2006}\)

\(=\frac{2005.2006+2005-1}{2004+2005.2006}\)

\(=\frac{2005.2006+2004}{2004+2005.2006}\)

\(=1\)

Answer 2

\(=\frac{2015\left(2006+1\right)-1}{2004+2005.2006}=\frac{2005.2006+2005-1}{2004+2005.2006}=1\)

Answer 3

\(\frac{2005.2007-1}{2005.2006+2004}=\frac{2005.2006+2005-1}{2005.2006+2004}=\frac{2005.2006+2004}{2005.2006+2004}=1\)

Answer 4

Ta có

\(\frac{2005.2007-1}{2004+2005.2006}\) =\(\frac{2005.\left(2006+1\right)-1}{2004+2005.2006}\) =\(\frac{2005.2006+2005-1}{2004+2005.2006}\)=\(\frac{2005.2006+2004}{2004+2005.2006}\)(tử=mẫu)=1

CHÚC BN HỌC TỐT

Answer 5

Ta có

\(\frac{2005.2007-1}{2004+2005.2006}\) =\(\frac{2005.\left(2006+1\right)-1}{2004+2005.2006}\) =\(\frac{2005.2006+2005-1}{2004+2005.2006}\)=\(\frac{2005.2006+2004}{2004+2005.2006}\)(tử=mẫu)=1

CHÚC BN HỌC TỐT