यदि $a + b + c = 0$,तो समीकरण $\left| \begin{array}{ccc} a - x & c & b \\ c & b - x & a \\ b & a & c - x \end{array} \right| = 0$ का हल क्या है?

  • A
    $0$
  • B
    $\pm \frac{3}{2}(a^2 + b^2 + c^2)$
  • C
    $0, \pm \sqrt{\frac{3}{2}(a^2 + b^2 + c^2)}$
  • D
    $0, \pm \sqrt{a^2 + b^2 + c^2}$

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यदि ${\left| {\begin{array}{cc} 4 & 1 \\ 2 & 1 \end{array}} \right|^2} = \left| {\begin{array}{cc} 3 & 2 \\ 1 & x \end{array}} \right| - \left| {\begin{array}{cc} x & 3 \\ -2 & 1 \end{array}} \right|$,तो $x =$

यदि आव्यूह $\begin{bmatrix} 0 & 1 & -2 \\ -1 & 0 & 3 \\ \lambda & -3 & 0 \end{bmatrix}$ अव्युत्क्रमणीय (singular) है,तो $\lambda = $

यदि त्रिभुज का क्षेत्रफल $4$ वर्ग इकाई है और शीर्ष $(k, 0), (4, 0), (0, 2)$ हैं,तो $k$ का मान ज्ञात कीजिए।

$\left|\begin{array}{ccc}\cos \alpha \cos \beta & \cos \alpha \sin \beta & -\sin \alpha \\ -\sin \beta & \cos \beta & 0 \\ \sin \alpha \cos \beta & \sin \alpha \sin \beta & \cos \alpha\end{array}\right|$ का मान ज्ञात कीजिए।

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