જો $\left|\begin{array}{lll}x & x^2 & 1+x^3 \\ y & y^2 & 1+y^3 \\ z & z^2 & 1+z^3\end{array}\right|=0$ અને $x, y, z$ બધા ભિન્ન હોય,તો $x y z=$

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

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જો $f(x)=\left|\begin{array}{ccc}x-3 & 2x^2-18 & 2x^3-81 \\ x-5 & 2x^2-50 & 4x^3-500 \\ 1 & 2 & 3\end{array}\right|$ હોય,તો $f(1) \cdot f(3)+f(3) \cdot f(5)+f(5) \cdot f(1)$ ની કિંમત શોધો.

જો $A, B, C$ એ ત્રિકોણના ખૂણા હોય,તો $\left| \begin{array}{ccc} -1 & \cos C & \cos B \\ \cos C & -1 & \cos A \\ \cos B & \cos A & -1 \end{array} \right| = $

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નીચે આપેલા નિશ્ચાયક $\left| \begin{matrix} 1 & 2 & 3 \\ 3 & 5 & 7 \\ 8 & 14 & 20 \end{matrix} \right|$ નું મૂલ્ય શોધો.

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$\left| {\begin{array}{ccc} 1 + i & 1 - i & i \\ 1 - i & i & 1 + i \\ i & 1 + i & 1 - i \end{array}} \right| = $

શિરોબિંદુઓ $P(k, 1)$,$Q(2, 4)$ અને $R(1, 1)$ ધરાવતા $\triangle PQR$ નું ક્ષેત્રફળ $3$ ચોરસ એકમ છે,તો $k = $ . . . . . . .

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