यदि $x, y \in R$ और $\left|\begin{array}{lll}\left(a^x+a^{-x}\right)^2 & \left(a^x-a^{-x}\right)^2 & 1 \\ \left(b^x+b^{-x}\right)^2 & \left(b^x-b^{-x}\right)^2 & 1 \\ \left(c^x+c^{-x}\right)^2 & \left(c^x-c^{-x}\right)^2 & 1\end{array}\right| = 2y+6$ है,तो $y=$

  • A
    -$3$
  • B
    $0$
  • C
    $3$
  • D
    $6$

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यदि $x, y, z$ भिन्न हैं और $\Delta=\left|\begin{array}{lll}x & x^{2} & 1+x^{3} \\ y & y^{2} & 1+y^{3} \\ z & z^{2} & 1+z^{3}\end{array}\right|=0,$ तो सिद्ध कीजिए कि $1+x y z=0$.

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यदि $a_{n} (>0)$ एक $G$.$P$. का $n$-वाँ पद है, तो सारणिक $\left|\begin{array}{lll}\log a_{n} & \log a_{n+1} & \log a_{n+2} \\ \log a_{n+3} & \log a_{n+4} & \log a_{n+5} \\ \log a_{n+6} & \log a_{n+7} & \log a_{n+8}\end{array}\right|$ का मान क्या होगा?

$\left| {\begin{array}{*{20}{c}} 1 & 5 & \pi \\ {{\log }_e}e & 5 & {\sqrt 5 } \\ {{\log }_{10}}10 & 5 & e \end{array}} \right| = $

शून्यतर $a, b, c$ के लिए,यदि $\Delta = \begin{vmatrix} 1 + a & 1 & 1 \\ 1 & 1 + b & 1 \\ 1 & 1 & 1 + c \end{vmatrix} = 0$ है,तो $\frac{1}{a} + \frac{1}{b} + \frac{1}{c}$ का मान =

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$3$ कोटि के विषम-सममित आव्यूह (skew-symmetric matrix) का सारणिक हमेशा होता है:

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