જો $\log _{a}(a b)=x$ હોય,તો $\log _{b}(a b)$ શું થાય?

  • A
    $\frac{1}{x}$
  • B
    $\frac{x}{x+1}$
  • C
    $\frac{x}{1-x}$
  • D
    $\frac{x}{x-1}$

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$\frac{3+\log _{10} 343}{2+\frac{1}{2} \log _{10} \left(\frac{49}{4}\right)+\frac{1}{3} \log _{10} \left(\frac{1}{125}\right)}=$

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