Các câu hỏi tương tự
\(choA=\frac{1}{1\cdot2}+\frac{1}{3\cdot4}+\frac{1}{5\cdot6}+...+\frac{1}{99\cdot100};B=\frac{1}{51\cdot100}+\frac{1}{52\cdot99}+...+\frac{1}{52\cdot99}+\frac{1}{100\cdot51}\)
\(\frac{1}{50\cdot51}+\frac{1}{51\cdot52}+\frac{1}{52\cdot53}+...+\frac{1}{99\cdot100}\)tính kết quả
\(\left(\frac{1}{51}+\frac{1}{52}+\frac{1}{53}+...+\frac{1}{100}\right)\div\left(\frac{1}{1\times2}+\frac{1}{3\times4}+\frac{1}{5\times6}+...+\frac{1}{99\times100}\right)\)
Cho S=\(\frac{1}{51}+\frac{1}{52}+\frac{1}{53}+...+\frac{1}{98}+\frac{1}{99}+\frac{1}{100}\)
So sánh với 1/2
Ai nhanh cho 3 tick!!!!!!!!!!!!!!!!!!!!!!!!!!!
Hãy so sánh A và B biết :
A = \(\frac{1}{1}-\frac{1}{2}+\frac{1}{3}-\frac{1}{4}+...+\frac{1}{99}\)\(-\frac{1}{100}\)
B = \(\frac{1}{51}+\frac{1}{52}+\frac{1}{53}...+\frac{1}{100}\)
Giúp mình nhé mai mình phải nộp rồi !
tìm x
(\(\frac{1}{1.2}\)+\(\frac{1}{3.4}\)+...+\(\frac{1}{99.100}\)). x =\(\frac{2012}{51}\)+\(\frac{2012}{52}\)+....+\(\frac{2012}{99}\)+\(\frac{2012}{100}\)
Tính nhanh
\(\frac{1}{2\cdot4}+\frac{1}{4\cdot6}+\frac{1}{6\cdot8}+.........+\frac{1}{99\cdot100}\)
\(\frac{3}{1\cdot2}+\frac{3}{2\cdot3}+\frac{3}{3\cdot4}+................................................+\frac{3}{99\cdot100}\)
F=\(\frac{4}{1\cdot5}\)+ \(\frac{4}{5\cdot9}\)+.............+\(\frac{4}{99\cdot100}\)+\(\frac{2}{2\cdot4}\)+\(\frac{2}{4\cdot6}\)+..............+\(\frac{2}{99\cdot100}\)