यदि $4\left[ {{x^2} + \frac{{{x^6}}}{3} + \frac{{{x^{10}}}}{5} + \dots} \right] = {y^2} + \frac{{{y^4}}}{2} + \frac{{{y^6}}}{3} + \dots$ है,तो

  • A
    ${x^2}y = 2x - y$
  • B
    ${x^2}y = 2x + y$
  • C
    $x = 2{y^2} - 1$
  • D
    ${x^2}y = 2x + {y^2}$

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$\log _4 2 - \log _8 2 + \log _{16} 2 - \ldots$ का मान ज्ञात कीजिए।

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