શ્રેણિક $\begin{bmatrix} x & 2 & 3 \\ 4 & 5 & 6 \\ 2 & 3 & 5 \end{bmatrix}$ વ્યસ્ત ન હોય તે માટે $x$ ની કિંમત શોધો.

  • A
    $\frac{-10}{7}$
  • B
    $\frac{7}{10}$
  • C
    $\frac{-7}{10}$
  • D
    $\frac{10}{7}$

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

$\left|\begin{array}{ccc}\cos \alpha \cos \beta & \cos \alpha \sin \beta & -\sin \alpha \\ -\sin \beta & \cos \beta & 0 \\ \sin \alpha \cos \beta & \sin \alpha \sin \beta & \cos \alpha\end{array}\right|$ ની કિંમત શોધો.

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જો $\left|\begin{array}{ll}3 & x \\ x & 1\end{array}\right|=\left|\begin{array}{ll}3 & 2 \\ 4 & 1\end{array}\right|$ હોય,તો $x$ ની કિંમત શોધો:

જો $\left[\begin{array}{rrr}1 & 2 & x \\ 4 & -1 & 7 \\ 2 & 4 & -6\end{array}\right]$ એ એક સિંગ્યુલર (અસામાન્ય) શ્રેણિક હોય, તો $x$ ની કિંમત શોધો.

$\begin{vmatrix} \cos^2\theta & -\sin^2\theta \\ \sin^2\theta & \cos^2\theta \end{vmatrix} = \dots$

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