Question:medium

If the system of simultaneous linear equations $x - 2y + z = 0$, $2x + 3y + z = 6$ and $x + 2y + pz = q$ has infinitely many solutions, then

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A system of linear equations $AX = B$ has infinitely many solutions if and only if the rank of the coefficient matrix $A$ is equal to the rank of the augmented matrix $[A|B]$, and this rank is less than the number of variables. For a 3x3 system, this is equivalent to $\Delta = \Delta_x = \Delta_y = \Delta_z = 0$.
Updated On: Mar 30, 2026
  • $p + q = 4$
  • $pq = 48/49$
  • $q - p = 3$
  • $p/q = 4/9$
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The Correct Option is C

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