यदि $\frac{\log x}{b - c} = \frac{\log y}{c - a} = \frac{\log z}{a - b}$ हो,तब निम्न में से कौन सा सत्य है?

  • A
    $xyz = 1$
  • B
    $x^a y^b z^c = 1$
  • C
    $x^{b + c} y^{c + a} z^{a + b} = 1$
  • D
    $xyz = x^a y^b z^c$

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$x$ के किन मानों के लिए निम्नलिखित सर्वसमिका मान्य है और सत्य है? $\tanh^{-1}(x) = \frac{1}{2} \log_e \left( \frac{1+x}{1-x} \right)$.

$\log ab - \log |b| = $

समीकरण ${9^x} - {2^{x + 1/2}} = {2^{x + 3/2}} - {3^{2x - 1}}$ का हल है:

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$\text{यदि } \log _{0.2}(x-1) > \log _{0.04}(x+5), \text{ तो }$

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