$x>0$ के लिए,यदि $y=\frac{10^{\log _{10} x}}{x^{2}}$ और $x=y^{a}$ है,तो $a=$

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

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$\frac{\log 49 \sqrt{7} + \log 25 \sqrt{5} - \log 4 \sqrt{2}}{\log 17.5} = $

यदि $3^{x-2}=5$ और $\log_{10} 2=0.30103, \log_{10} 3=0.4771$ है,तो $x=$

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यदि $\log _{2} x+\log _{4} x+\log _{16} x=21 / 4$ है,तो $x=$

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

यदि $0 < a \leq x$ है,तो $\log_{a} x + \log_{x} a$ का न्यूनतम मान क्या है?

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