यदि $y = x - \frac{x^2}{2} + \frac{x^3}{3} - \dots \infty$ है,तो $x = $

  • A
    $y - \frac{y^2}{2} + \frac{y^3}{3} - \dots \infty$
  • B
    $y + \frac{y^2}{2!} + \frac{y^3}{3!} + \dots \infty$
  • C
    $1 + y + \frac{y^2}{2!} + \frac{y^3}{3!} + \dots$
  • D
    इनमें से कोई नहीं

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