જો $\log \left(\frac{x+y}{5}\right) = \frac{1}{2}(\log x + \log y)$ હોય,તો $\frac{x}{y} + \frac{y}{x} = $

  • A
    $20$
  • B
    $23$
  • C
    $22$
  • D
    $21$

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

$2 \log _{3} 7 - 7 \log _{3} 2$ ની કિંમત શોધો.

જો $0 < a < 1$,$0 < x < 1$ અને $x < a$ હોય,તો $\log_{a} x$ શું થાય?

જો $\log _{10}\left[98+\sqrt{x^{2}-12 x+36}\right]=2$ હોય,તો $x=$

$\frac{\log _{9} 11}{\log _{5} 13}-\frac{\log _{3} 11}{\log _{\sqrt{5}} 13}=$

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