<=>[ (x-1)/2019] -1 +[(x-2)/2018]-1 = [(x-3)/2017]-1 +[(x-4)/2016] -1
<=> (x-2020)/2019 +(x-2020)/2018 = (x-2020)/2017 + (x-2020)/2016
<=> (x-2020)( 1/2019+1/2018-1/2017-1/2016)= 0
=> x-2020= 0 => x= 2020
Tìm x biết:
a) \(\frac{x+2}{12}+\frac{x+2}{13}=\frac{x+2}{14}+\frac{x+2}{15}\)
b) \(\frac{x+4}{2016}+\frac{x+3}{2017}=\frac{x+2}{2018}+\frac{x+1}{2019}\)
Tìm x biết:
\(\frac{x+1}{2019}+\)\(\frac{x+2}{2018}\)\(=\frac{x+3}{2017}+\)\(\frac{x+4}{2016}\)
Tìm x
\(\frac{x-2017}{2015.2016}+\frac{x-2018}{2016.2017}+\frac{x-2019}{2017.2018}+\frac{x-2020}{2018.1019}=\frac{1}{2015}+\frac{1}{2016}+\frac{1}{2017}+\frac{1}{1018}\)
Tìm x biết
\(\frac{x-1}{2019}\)+ \(\frac{x-2}{2018}\)- \(\frac{x-3}{2017}\)= \(\frac{x-4}{2016}\)
Tim x
\(\frac{x+2015}{5}+\frac{x+2016}{4}=\frac{x+2017}{3}+\frac{x+2018}{2}\)
2/ tim x
\(\frac{x+2015}{5}+\frac{x+2016}{6}=\frac{x+2017}{7} +\frac{x+2018}{8}\)
3/ tim x
\(\frac{1}{3}+\frac{1}{6}+\frac{99}{101}+\frac{1}{15}+... +\frac{1}{x\left(2x+1\right)}=\frac{1}{10}\)
Tìm x biết \(\frac{x-1}{2017}+\frac{x-2}{2018}-\frac{x-3}{2019}=\frac{x-4}{2020}\)
\(\frac{x-1}{2018}+\frac{x-2}{2017}=\frac{x-3}{2016}+\frac{x-4}{2015}\)
Tìm x:
a) /2x+3/ = x+2
b) \(\left(x-7\right)^{x+2015}-\left(x-7\right)^{x+2016}=0\)
c) \(\frac{x+4}{2016}+\frac{x+3}{2017}=\frac{x+2}{2018}+\frac{x+1}{2019}\)
Tìm X biết ; \(\frac{X-1}{2019}\)+\(\frac{X-2}{2018}\)+\(\frac{X-3}{2017}\)+\(\frac{X-4}{2016}\).................+\(\frac{X-10}{2010}\) . CÁC BẠN GIÚP MÌNH VỚI .
