यदि $\frac{1}{\log _{x} 10}=\frac{2}{\log _{a} 10}-2$ है,तो $x=$

  • A
    $a / 2$
  • B
    $a / 100$
  • C
    $a^{2} / 10$
  • D
    $a^{2} / 100$

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

यदि $\log _{10} 2 = 0.3010$ और $\log _{10} 7 = 0.8451$ है,तो $\log _{10} 2.8$ का मान ज्ञात कीजिए।

यदि $\frac{\log x}{b-c} = \frac{\log y}{c-a} = \frac{\log z}{a-b}$ है,तो $xyz = x^a \cdot y^b \cdot z^c = x^{b+c} \cdot y^{c+a} \cdot z^{a+b} = $

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यदि $\log_{10} 2 = 0.3010$ है,तो $\log_{10}(1/2) =$

$2 \log _{3} 7 - 7 \log _{3} 2$ का मान ज्ञात कीजिए।

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