JEE PYQ: Matrices And Determinants Question 79
Question 79 - 2019 (10 Jan Shift 1)
If the system of equations $x + y + z = 5$, $x + 2y + 3z = 9$, $x + 3y + \alpha z = \beta$ has infinitely many solutions, then $\beta - \alpha$ equals:
(1) $21$
(2) $8$
(3) $18$
(4) $5$