यदि $y = 2x^2 - 1$ है,तो $\left[ \frac{1}{y} + \frac{1}{3y^3} + \frac{1}{5y^5} + \dots \right]$ का मान क्या होगा?

  • A
    $\frac{1}{2} \left[ \frac{1}{x^2} - \frac{1}{2x^4} + \frac{1}{3x^6} - \dots \right]$
  • B
    $\frac{1}{2} \left[ \frac{1}{x^2} + \frac{1}{2x^4} + \frac{1}{3x^6} + \dots \right]$
  • C
    $\frac{1}{2} \left[ \frac{1}{x^2} + \frac{1}{3x^6} + \frac{1}{5x^{10}} + \dots \right]$
  • D
    $\frac{1}{2} \left[ \frac{1}{x^2} - \frac{1}{3x^6} + \frac{1}{5x^{10}} - \dots \right]$

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$\log_e(1 + 3x + 2x^2)$ के विस्तार में $x^n$ का गुणांक क्या है?

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