यदि $\log _{10} 50+\log _{10} 20=x$ है,तो $x$ का मान क्या होगा?

  • A
    $1/3$
  • B
    $-3$
  • C
    $3$
  • D
    $0.3$

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

यदि $\log x : 3 = \log y : 4 = \log z : 5$ है,तो $zx =$

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

$\log _{5} 2$ है

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

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