यदि $(4.2)^{x} = (0.42)^{y} = 100$ है,तो $\frac{1}{x} - \frac{1}{y} = $

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

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यदि $\log _{10} 87.5 = 1.9421$ है,तो $(875)^{10}$ में अंकों की संख्या क्या है?

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यदि $\log _{x} y=100$ और $\log _{2} x=10$ है,तो $y$ का मान क्या होगा?

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

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