Các câu hỏi tương tự
11 tháng 3 2018 lúc 14:53
Chứng tỏ \(\frac{A}{B}\) là một số nguyên biết :
\(A=\frac{1}{1\cdot2}+\frac{1}{3\cdot4}+\frac{1}{5\cdot6}+....+\frac{1}{2013\cdot2014}\)
\(B=\frac{1}{1008\cdot2014}+\frac{1}{1009\cdot2013}+\frac{1}{2010\cdot2012}+....+\frac{1}{2014\cdot1008}\)
\(\frac{\frac{2013}{2}+\frac{2013}{3}+\frac{2013}{4}+................+\frac{2013}{2014}}{\frac{2013}{1}+\frac{2012}{2}+\frac{2011}{3}+.............+\frac{1}{2013}}\)
Tinh tổng trên
tính \(\frac{\frac{2013}{2}+\frac{2013}{3}+\frac{2013}{4}+\frac{2013}{2014}}{\frac{2013}{1}+\frac{2012}{2}+\frac{2011}{3}+...+\frac{1}{2013}}\)
Tính:
\(\frac{\frac{2013}{2}+\frac{2013}{3}+\frac{2013}{4}+......+\frac{2013}{2014}}{\frac{2013}{1}+\frac{2012}{2}+\frac{2011}{3}+......+\frac{1}{2013}}\)
Tính \(\frac{\frac{2013}{2}+\frac{2013}{3}+\frac{2013}{4}+...+\frac{2013}{2014}}{\frac{2013}{1}+\frac{2012}{2}+\frac{2011}{3}+...+\frac{1}{2013}}\) Đúng cho 3 tick ^^
so sánh A=\(\frac{1}{1\cdot2\cdot3}\)+\(\frac{1}{2\cdot3\cdot4}+\frac{1}{3\cdot4\cdot5}+...+\frac{1}{2012\cdot2013\cdot2014}\) với \(\frac{1}{4}\)
Tính:
$\frac{\frac{2013}{2}+\frac{2013}{3}+\frac{2013}{4}+......+\frac{2013}{2014}}{\frac{2013}{1}+\frac{2012}{2}+\frac{2011}{3}+......+\frac{1}{2013}}$20132 +20133 +20134 +......+20132014 20131 +20122 +20113 +......+12013
Tính
\(\frac{\frac{2013}{2}+\frac{2013}{3}+\frac{2013}{4}+.......+\frac{2013}{2014}}{\frac{2013}{1}+\frac{2012}{2}+\frac{2013}{3}+.......+\frac{1}{2013}}\)
Tính \(\frac{B}{A}\)
\(A=\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{2013}\)
\(B=\frac{2013}{1}+\frac{2012}{2}+\frac{2011}{3}+...+\frac{1}{2014}\)