\(\frac{4}{2.3}.\frac{10}{3.4}...>\frac{2016.2017-2}{2016.2017}\)
\(\frac{4}{2.3}.\frac{10}{3.4}...>\frac{2016.2017-2}{2016.2017}\)
Tính hợp lý
a) A = \(\left(1-\frac{1}{1.2}\right)+\left(1-\frac{1}{2.3}\right)+...+\left(1-\frac{1}{2016.2017}\right)\)
Tìm số hữu tỉ x biết
1.2-1/2!+2.3-1/3!+3.4-1/4!+.....+2016.2017-1/2017!
\(\left|x+\frac{1}{3.4}\right|+\left|x+\frac{1}{4.5}\right|+\left|x+\frac{1}{5.6}\right|+......+\left|x+\frac{1}{2016.2017}\right|=2015x\) tìm x
Tìm x : |x+1/1.2|+|x+1/2.3|+|x+1/3.4|+...+|x+2016.2017|=2017xGiúp mình với ! Cảm ơn
\(\frac{1}{5.6}-\frac{1}{6.7}-\frac{1}{7.8}-...-\frac{1}{2016.2017}\)
Tìm x
\(\frac{x-2017}{2015.2016}+\frac{x-2018}{2016.2017}+\frac{x-2019}{2017.2018}+\frac{x-2020}{2018.1019}=\frac{1}{2015}+\frac{1}{2016}+\frac{1}{2017}+\frac{1}{1018}\)
1/1.2+1/2.3+1/2.3+...+1/2016.2017
Cho 2 biểu thức : A = 2016.1+2015.2+....+1.2016 và B = 1.2 +2.3+....+2016.2017
Tính 4A^2-B^2
So Sanh Hai Phan So Sau:
\(A=\frac{2014}{2015}-\frac{2015}{2016}+\frac{2016}{2017}-\frac{2017}{2018}\) VA \(B=-\frac{1}{2014.2015}-\frac{1}{2016.2017}\)