यदि $\frac{\log _{2} a}{2}=\frac{\log _{3} b}{3}=\frac{\log _{4} c}{4}$ और $a^{1 / 2} \cdot b^{1 / 3} \cdot c^{1 / 4}=24$ है,तो:

  • A
    $a=24$
  • B
    $b=81$
  • C
    $c=64$
  • D
    $c=256$

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यदि $x=\log _{a} b c, y=\log _{b} c a, z=\log _{c} a b,$ है,तो

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यदि $\log \left(\frac{x+y}{5}\right) = \frac{1}{2}(\log x + \log y)$ है,तो $\frac{x}{y} + \frac{y}{x} = $

$\log _{5}\left(1+\frac{1}{5}\right)+\log _{5}\left(1+\frac{1}{6}\right)+\log _{5}\left(1+\frac{1}{7}\right)+\cdots+\log _{5} \left(1+\frac{1}{624}\right)$

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