$\log_e x - \log_e (x - 1) = $

  • A
    $\frac{1}{x} - \frac{1}{2x^2} + \frac{1}{3x^3} - \dots \infty $
  • B
    $\frac{1}{x} + \frac{1}{2x^2} + \frac{1}{3x^3} + \dots \infty $
  • C
    $2 \left( \frac{1}{x} + \frac{1}{3x^3} + \frac{1}{5x^5} + \dots \infty \right)$
  • D
    $2 \left( \frac{1}{x} - \frac{1}{3x^3} + \frac{1}{5x^5} - \dots \infty \right)$

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$\frac{1}{2} + \frac{1}{3} \cdot \frac{1}{2^3} + \frac{1}{5} \cdot \frac{1}{2^5} + \dots \infty$ का योग क्या है?

यदि $\tanh ^{-1} x = a \log \left(\frac{1+x}{1-x}\right)$, $|x| < 1$ है, तो $a$ का मान ज्ञात कीजिए।

$1 + \frac{(\log_e n)^2}{2!} + \frac{(\log_e n)^4}{4!} + \dots = $

$\log_e \left( 1 + ax^2 + a^2 + \frac{a}{x^2} \right)$ का मान क्या है?

यदि $\alpha, \beta$ समीकरण $x^2 - px + q = 0$ के मूल हैं,तो $\log_e(1 + px + qx^2) = $

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