If the system of linear equations $2 x+y-z=3, x-y-z=\alpha, 3 x+3 y+\beta z=3$ has infinitely many s

Question

If the system of linear equations $2 x+y-z=3, x-y-z=\alpha, 3 x+3 y+\beta z=3$ has infinitely many solutions, then $\alpha+\beta-\alpha \beta$ is equal to

Professor PC Thomas Classes · Answer

(5)\