यदि $\log _{10} 87.5 = 1.9421$ है,तो $(875)^{10}$ में अंकों की संख्या क्या है?

  • A
    $30$
  • B
    $29$
  • C
    $20$
  • D
    $19$

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यदि $\log _{a}(a b)=x$ है,तो $\log _{b}(a b)$ का मान क्या होगा?

$2 \log _{3} 7 - 7 \log _{3} 2$ का मान ज्ञात कीजिए।

यदि $\frac{\log _{2} x}{3}=\frac{\log _{2} y}{4}=\frac{\log _{2} z}{5 k}$ और $\frac{z}{x^{3} y^{4}}=1$ है,तो $k=$

$7 \log \frac{16}{15} + 5 \log \frac{25}{24} + 3 \log \frac{81}{80} =$

यदि $\log _{10} 2986 = 3.4751$ है,तो $\log _{10} 0.02986 =$

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