\(\frac{2005\times2007-1}{2004+2005\times2006}\)
=\(\frac{2005\times\left(2006+1\right)-1}{2004+2005\times2006}\)
=\(\frac{2005\times2006+2005\times1-1}{2004+2005\times2006}\)
=\(\frac{2005\times2006+2005-1}{2004+2005\times2006}\)
=\(\frac{2005\times2006+2004}{2004+2005\times2006}\)
Ta thấy tử số và mẫu số giống nhau nên kết quả của biểu thức bằng 1
Li-ke cho mik nhé!
\(\frac{2005.2007-1}{2004+2005.2006}=\frac{2005.\left(2006+1\right)-1}{2004+2005.2006}=\frac{2005.2006+2005.1-1}{2004+2005.2006}=\frac{2005.2006+2004}{2004+2005.2006}=1\)
\(\frac{2005.2007-1}{2004+2005.2006}=\frac{2005.\left(2006+1\right)-1}{2005.2006+2004}=\frac{2005.2006+2005-1}{2005.2006+2004}=\frac{2005.2006+2004}{2005.2006+2004}=1\)
\(\frac{2005\cdot2007-1}{2004+2005\cdot2006}\)
\(=\frac{2005\cdot\left(2006+1\right)-1}{2004+2005\cdot2006}\)
\(=\frac{2005\cdot2006+2005-1}{2004+2005\cdot2006}\)
=\(=\frac{2005\cdot2006+2004}{2004+2005\cdot2006}\)