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

  • A
    $\log_b a$
  • B
    $\log_a b$
  • C
    $\log_e a - \log_e b$
  • D
    $\log_e a + \log_e b$

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$(0.5) - \frac{(0.5)^2}{2} + \frac{(0.5)^3}{3} - \frac{(0.5)^4}{4} + \dots$

मान लीजिए $x \in R$ और $|x| < 1$ है। तो $\tanh ^{-1} x=$

यदि $|x| < 1$ और $y = x - \frac{x^2}{2} + \frac{x^3}{3} - \frac{x^4}{4} + \ldots$ है,तो $x$ का मान क्या होगा?

यदि $y = x - \frac{x^2}{2!} + \frac{x^3}{3!} - \frac{x^4}{4!} + \dots$ है,तो $x = $

$\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 = $

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