JEE Math Practice Question
If the system of equations $$ \begin{aligned} & 2 x+3 y-z=5 \\\\ & x+\alpha y+3 z=-4 \\\\ & 3 x-y+\beta z=7 \end{aligned} $$ has infinitely many solutions, then $13 \alpha \beta$ is equal to :
- A.1110
- B.1120
- C.1210
- D.1220
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