જો $a, b, c$ શૂન્યતર વાસ્તવિક સંખ્યાઓ હોય અને સમીકરણોની સંહતિ $(a - 1)x = y + z,$ $(b - 1)y = z + x,$ $(c - 1)z = x + y$ નો ઉકેલ શૂન્યતર (non-trivial) હોય,તો $ab + bc + ca$ ની કિંમત શું થાય?

  • A
    $a + b + c$
  • B
    $abc$
  • C
    $1$
  • D
    $-1$

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જો $\left|\begin{array}{ccc}0 & ab^2 & ac^2 \\ a^2b & 0 & bc^2 \\ a^2c & b^2c & 0\end{array}\right|=m(abc)^k$ હોય, તો $m+k=$ . . . . . . .

ધારો કે $A = \begin{bmatrix} 5 & 5\alpha & \alpha \\ 0 & \alpha & 5\alpha \\ 0 & 0 & 5 \end{bmatrix}$. જો $|A|^2 = 25$ હોય,તો $|\alpha|$ ની કિંમત શોધો.

$\left|\begin{array}{ccc}\frac{-bc}{a^2} & \frac{c}{a} & \frac{b}{a} \\ \frac{c}{b} & \frac{-ac}{b^2} & \frac{a}{b} \\ \frac{b}{c} & \frac{a}{c} & \frac{-ab}{c^2}\end{array}\right| = $

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