Question

Cho \(A=\frac{2009.2010-2}{2008+2008.2010};B=\frac{-2009.20102010}{20092009.2010}\). Tính A + B

Answer 1

\(A=\frac{2009.2010-2}{2008+2008.2010}=\frac{\left(2008+1\right).2010-2}{2008+2008.2010}\)

     \(=\frac{2008.2010+2010-2}{2008+2008.2010}=\frac{2008.2010+2008}{2008+2008.2010}=1\)

\(B=\frac{-2009.20102010}{20092009.2010}=\frac{-2009.2010.10001}{2009.10001.2010}=-1\)

Vậy A + B = 1 + (-1) = 0

Answer 2

 

\(A=\frac{2009.2010-2}{2008+2008.2010}=\frac{\left(2008+1\right).2010-2}{2008+2008.2010}\)

     \(=\frac{2008.2010+2010-2}{2008+2008.2010}=\frac{2008.2010+2008}{2008+2008.2010}=1\)

\(B=\frac{-2009.20102010}{20092009.2010}=\frac{-2009.2010.10001}{2009.10001.2010}\)

Vậy A + B = 1 + (-1) = 0

Answer 3

kiểu này cuối tuần việt đầu bảng điểm chắc lun