Tìm x biết: 1/x(x + 1) + 1/(x + 1).(x + 2) + 1/(x + 2).(x + 3) - 1/x = 1/2010, Tìm x biết: 1/x.(x + 1) + 1/(x + 1).(x + 2) + 1/(x + 2).(x + 3) - 1/x = 1/2010, Tìm x biết:  1/x(x + 1) + 1/(x + 1)(x + 2) + 1/(x + 2)(x + 3) - 1/x = 1/2010, TÌm x biết 1/x.(x + 1) + 1/(x + 1).(x + 2) + 1/(x + 2).(x + 3) - 1/x = 1/2010