જો $\left| \begin{matrix} a - b - c & 2a & 2a \\ 2b & b - c - a & 2b \\ 2c & 2c & c - a - b \end{matrix} \right| = (a + b + c)(x + a + b + c)^2$,$x \ne 0$ અને $a + b + c \ne 0$ હોય,તો $x$ ની કિંમત શોધો.

  • A
    $abc$
  • B
    $-2(a + b + c)$
  • C
    $2(a + b + c)$
  • D
    $-(a + b + c)$

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ધારો કે $D_{k} = \begin{vmatrix} 1 & 2k & 2k-1 \\ n & n^2+n+2 & n^2 \\ n & n^2+n & n^2+n+2 \end{vmatrix}$. જો $\sum_{k=1}^{n} D_{k} = 96$ હોય,તો $n$ ની કિંમત શોધો.

$\theta \in (0, \pi /3)$ માટે,જેની માટે $\left| \begin{array}{ccc} 1 + \cos^2 \theta & \sin^2 \theta & 4 \cos 6\theta \\ \cos^2 \theta & 1 + \sin^2 \theta & 4 \cos 6\theta \\ \cos^2 \theta & \sin^2 \theta & 1 + 4 \cos 6\theta \end{array} \right| = 0$ થાય,તે $\theta$ ની કિંમત શોધો.

જો $a, b, c$ બધા અલગ હોય અને $\left| \begin{array}{ccc} a & a^3 & a^4 - 1 \\ b & b^3 & b^4 - 1 \\ c & c^3 & c^4 - 1 \end{array} \right| = 0$ હોય,તો $abc(ab + bc + ca)$ ની કિંમત શું થાય?

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જો $a, b$ અને $c$ એ $A$.$P$. માં હોય,તો $\left|\begin{array}{lll}x+2 & x+3 & x+a \\ x+4 & x+5 & x+b \\ x+6 & x+7 & x+c\end{array}\right|$ નું મૂલ્ય શું થાય?

જો $\left|\begin{array}{ccc}a^{2} & b c & c^{2}+a c \\ a^{2}+a b & b^{2} & c a \\ a b & b^{2}+b c & c^{2}\end{array}\right|=k a^{2} b^{2} c^{2}$ હોય, તો $k=$

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