In what case does the system of equations
have a solution? Find conditions under which the unique solution of the above system is an arithmetic progression.
%V0
In what case does the system of equations
$\begin{matrix} x + y + mz = a \\ x + my + z = b \\ mx + y + z = c \end{matrix}$
have a solution? Find conditions under which the unique solution of the above system is an arithmetic progression.
Školjka