જો $a^2 + b^2 + c^2 = -2$ અને $f(x) = \left| \begin{array}{ccc} 1 + a^2x & (1 + b^2)x & (1 + c^2)x \\ (1 + a^2)x & 1 + b^2x & (1 + c^2)x \\ (1 + a^2)x & (1 + b^2)x & 1 + c^2x \end{array} \right|$ હોય,તો $f(x)$ એ કેટલા ઘાતવાળી બહુપદી છે?

  • A
    $0$
  • B
    $1$
  • C
    $2$
  • D
    $3$

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ધારો કે $A = \begin{bmatrix} 1 & \sin \theta & 1 \\ -\sin \theta & 1 & \sin \theta \\ -1 & -\sin \theta & 1 \end{bmatrix}$,જ્યાં $0 \leq \theta \leq 2 \pi$. તો

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