જો $\log (2 a-3 b)=\log a-\log b$ હોય,તો $a=$

  • A
    $\frac{3 b^{2}}{2 b-1}$
  • B
    $\frac{3 b}{2 b-1}$
  • C
    $\frac{b^{2}}{2 b+1}$
  • D
    $\frac{3 b^{2}}{2 b+1}$

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જો $\log 2 = 0.30103$ અને $\log 3 = 0.4771$ હોય,તો $(648)^{5}$ માં અંકોની સંખ્યા કેટલી થાય?

$\log _{5}\left(1+\frac{1}{5}\right)+\log _{5}\left(1+\frac{1}{6}\right)+\log _{5}\left(1+\frac{1}{7}\right)+\cdots+\log _{5} \left(1+\frac{1}{624}\right)$

જો $x=\log _{a} b c, y=\log _{b} c a, z=\log _{c} a b,$ હોય,તો

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જો $\log_{10} 2 = 0.3010$ હોય,તો $\log_{10}(1/2) =$

જો $4^{x} + 2^{2x-1} = 3^{x+\frac{1}{2}} + 3^{x-\frac{1}{2}},$ હોય તો $x =$

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