Let $x = \alpha, y = \beta, z = \gamma$ be the unique solution of the system of simultaneous linear equations $2x + 3y - 2z + 4 = 0$, $3x - 4y + 3z + 5 = 0$, and $kx - 2y + z + 3 = 0$. If $\alpha = -2$, then $k =$

  • A
    $\left| \begin{array}{ll} 1 & 2 \\ 3 & 5 \end{array} \right|$
  • B
    $\left| \begin{array}{ll} 5 & 3 \\ 1 & 2 \end{array} \right|$
  • C
    $\left| \begin{array}{ll} 3 & 5 \\ 1 & 2 \end{array} \right|$
  • D
    $\left| \begin{array}{ll} 3 & 5 \\ 2 & 1 \end{array} \right|$

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Let $a, b, c$ be positive real numbers. The following system of equations in $x, y, z$:
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$-\frac{x^2}{a^2} + \frac{y^2}{b^2} + \frac{z^2}{c^2} = 1$
has:

Let $\alpha, \beta \in R$ be such that the system of linear equations $x+2y+z=5, 2x+y+\alpha z=5, 8x+4y+\beta z=18$ has no solution. Then $\frac{\beta}{\alpha}$ is equal to:

The system of equations $x + y + z = 2$,$3x - y + 2z = 6$ and $3x + y + z = -18$ has

The system of equations $x+y+z=5, x+2y+az=9, x+2y+z=b$ is inconsistent if

If $\begin{bmatrix} 3 & 1 \\ 4 & 1 \end{bmatrix} X = \begin{bmatrix} 5 & -1 \\ 2 & 3 \end{bmatrix}$,then $X =$

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