यदि $\log _{30} 3=a$ और $\log _{30} 5=b$ है,तो $\log _{30} 8$ का मान ज्ञात कीजिए।

  • A
    $3(1-a-b)$
  • B
    $a-b+1$
  • C
    $1-a-b$
  • D
    $3(a-b+1)$

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यदि $\frac{\log _{2} a}{2}=\frac{\log _{3} b}{3}=\frac{\log _{4} c}{4}$ और $a^{1 / 2} \cdot b^{1 / 3} \cdot c^{1 / 4}=24$ है,तो:

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