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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