The equation x(1)/x(2) + x(2)/x(3) + x(3)/x(4) + x(4)/x(1) = n-MedSci.cn

The equation x(1)/x(2) + x(2)/x(3) + x(3)/x(4) + x(4)/x(1) = n

Dofs, E; Tho, NX

Tho, NX (通讯作者)，Hanoi Univ Sci & Technol, Sch Appl Math & Informat, Hanoi, Vietnam.;Tho, NX (通讯作者)，Int Sch Pk City Hanoi, Hanoi, Vietnam.