Tuyển Cộng tác viên Hoc24 nhiệm kì 26 tại đây: https://forms.gle/dK3zGK3LHFrgvTkJ6
(1/2+1/3+..................+1/2012=1/2013).x=2012/1+2011/2+...................+2/2011+1/2012
(1/2+1/3+..................+1/2012=1/2013).x=2012/1+2011/2+...................+2/2011+1/2012
(1/2+1/3+....+1/2012+1/2013)*x=2012/1+2011/2+2010/3+...+2/2011+1/2012
tìm x,biet(1/2+1/3+.............+1/2012+1/2013).x=2012/1+2011/2+2010/3+......+2/2011+1/2012
Tìm x biết (1/2+1/3+...+1/2012+1/2013).x = 2012/1+2011/2+2010/3+...+2/2011+1/2012
Tìm x:
x . (1/2+1/3+1/4+. . .+1/2011+1/2012)
2012/1+2011/2+2010/3+2009/4+ . . . +2/2011+1/2012
=1
tìm X biết : ( 1 / 2 + 1/3 + ........+ 1 /2012 + 1/2013 ) . x = 2012/1 + 2011/2 + 2010 /3 + .....+2/2011+1/2012
(1/2+1/3+1/4+...+1/2013).x=2012/1+2011/2+...+2/2011+1/2012
(1/2 + 1/3 + ... +1/2012 + 1/2013).x = 2012/1 + 2012/2 + 2012/3 + ... +2/2011 + 1/2012
