मान ज्ञात कीजिए: $\log_e \sqrt{\frac{1+x}{1-x}}$

  • A
    $x + \frac{x^3}{3} + \frac{x^5}{5} + \dots$
  • B
    $2 \left[ x + \frac{x^3}{3} + \frac{x^5}{5} + \dots \infty \right]$
  • C
    $2 \left[ x^2 + \frac{x^4}{4} + \frac{x^6}{6} + \dots \infty \right]$
  • D
    इनमें से कोई नहीं

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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?

यदि $0 < x < 1$ है,तो $\frac{3}{2} x^{2} + \frac{5}{3} x^{3} + \frac{7}{4} x^{4} + \ldots$ का मान ज्ञात कीजिए:

$\frac{1}{2} + \frac{3}{2} \cdot \frac{1}{4} + \frac{5}{3} \cdot \frac{1}{8} + \frac{7}{4} \cdot \frac{1}{16} + \dots \infty = $

$\frac{x - 1}{x + 1} + \frac{1}{2} \cdot \frac{x^2 - 1}{(x + 1)^2} + \frac{1}{3} \cdot \frac{x^3 - 1}{(x + 1)^3} + \dots \infty = $

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

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