यदि $\log x = \frac{\log y}{2} = \frac{\log z}{5}$ है,तो $x^{4} \cdot y^{3} \cdot z^{-2} = $

  • A
    $2$
  • B
    $10$
  • C
    $1$
  • D
    $0$

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यदि $\frac{\log x}{l+m-2n} = \frac{\log y}{m+n-2l} = \frac{\log z}{n+l-2m}$ है,तो $x^2 y^2 z^2$ का मान ज्ञात कीजिए।

$\log _{10} \tan 40^{\circ} \cdot \log _{10} \tan 41^{\circ} \cdots \log _{10} \tan 50^{\circ} = ?$

यदि $\log (2 a-3 b)=\log a-\log b$ है,तो $a=$

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