જો $\left| \begin{array}{ccc} y + z & x & y \\ z + x & z & x \\ x + y & y & z \end{array} \right| = k(x + y + z)(x - z)^2$ હોય,તો $k = $

  • A
    $2xyz$
  • B
    $1$
  • C
    $xyz$
  • D
    $x^2y^2z^2$

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નિશ્ચાયક $\left|\begin{array}{ccc}1+a^{2}-b^{2} & 2 a b & -2 b \\ 2 a b & 1-a^{2}+b^{2} & 2 a \\ 2 b & -2 a & 1-a^{2}-b^{2}\end{array}\right|$ નું મૂલ્ય શું છે?

નિશ્ચાયકનું મૂલ્ય શોધો: $\left| {\begin{array}{*{20}{c}}{{b^2} - ab}&{b - c}&{bc - ac}\\{ab - {a^2}}&{a - b}&{{b^2} - ab}\\{bc - ac}&{c - a}&{ab - {a^2}}\end{array}} \right|$

શૂન્યતર $a, b, c$ માટે,જો $\Delta = \begin{vmatrix} 1 + a & 1 & 1 \\ 1 & 1 + b & 1 \\ 1 & 1 & 1 + c \end{vmatrix} = 0$ હોય,તો $\frac{1}{a} + \frac{1}{b} + \frac{1}{c}$ ની કિંમત =

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$\Delta=\left|\begin{array}{ccc}2 & -3 & 5 \\ 6 & 0 & 4 \\ 1 & 5 & -7\end{array}\right|$ માટે ગુણધર્મ $1$ ચકાસો.

નિશ્ચાયકના ગુણધર્મોનો ઉપયોગ કરીને અને વિસ્તરણ કર્યા વગર સાબિત કરો કે:
$\left|\begin{array}{lll}2 & 7 & 65 \\ 3 & 8 & 75 \\ 5 & 9 & 86\end{array}\right|=0$

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