Ta có :
\(\frac{1}{2009}+\frac{2}{2009}+....+\frac{2008}{2009}\)
\(=\frac{1+2+....+2008}{2009}\)
\(=\frac{2017036}{2009}=1004\)
Ta có ; \(\frac{1}{2009}+\frac{2}{2009}+\frac{3}{2009}+......+\frac{2008}{2009}\)
\(=\frac{1+2+3+......+2008}{2009}\)
\(=\frac{2017036}{2009}=1004\)
Ta có :
\(\frac{1}{2009}+\frac{2}{2009}+......+\frac{2008}{2009}\)
\(=\frac{1+2+3+....+2008}{2009}\)
\(=\frac{2017036}{2009}=1004\)
Mẫu giữ nguyên.Ta thực hiện tử:
(2008-1)+1=2008
(2008+1)x2008:2=2017036
Ta có:2017036/2009=1004
Vậy số cần tìm là:1004