જો $A = \begin{bmatrix} 2 & 5 \\ 3 & 7 \end{bmatrix}$ અને $B = \begin{bmatrix} 0 & 3 \\ 4 & 1 \end{bmatrix}$ હોય,તો નીચેનામાંથી કયો ગુણધર્મ સાચો છે?

  • A
    $|AB| = |A||B|$
  • B
    $|AB| = |A|$
  • C
    $|AB| = |B|$
  • D
    $|AB| = -|A||B|$

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નિશ્ચાયકના ગુણધર્મોનો ઉપયોગ કરીને સાબિત કરો કે:
$\left|\begin{array}{ccc}\alpha & \alpha^{2} & \beta+\gamma \\ \beta & \beta^{2} & \gamma+\alpha \\ \gamma & \gamma^{2} & \alpha+\beta\end{array}\right|=(\beta-\gamma)(\gamma-\alpha)(\alpha-\beta)(\alpha+\beta+\gamma)$

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

જો $\left| {\begin{array}{*{20}{c}}{1 + {{\sin }^2}\theta }&{{{\sin }^2}\theta }&{{{\sin }^2}\theta }\\{{{\cos }^2}\theta }&{1 + {{\cos }^2}\theta }&{{{\cos }^2}\theta }\\{4\sin 4\theta }&{4\sin 4\theta }&{1 + 4\sin 4\theta }\end{array}} \right| = 0$ હોય,તો $\sin 4\theta$ ની કિંમત શોધો.

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જો $a - 2b + c = 1$ હોય,તો $\left| \begin{array}{ccc} x + 1 & x + 2 & x + a \\ x + 2 & x + 3 & x + b \\ x + 3 & x + 4 & x + c \end{array} \right|$ નું મૂલ્ય શું થાય?

નિશ્ચાયક $\left| {\begin{array}{*{20}{c}}1&1&1\\{\cos (nx)}&{\cos (n + 1)x}&{\cos (n + 2)x}\\{\sin (nx)}&{\sin (n + 1)x}&{\sin (n + 2)x}\end{array}} \right|$ નું મૂલ્ય કોનાથી સ્વતંત્ર છે?

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