જો $y = x - \frac{x^2}{2} + \frac{x^3}{3} - \dots \infty$ હોય,તો $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
    આમાંથી કોઈ નહીં

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$\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 = $

જો $\tanh ^{-1} x = a \log \left(\frac{1+x}{1-x}\right)$, $|x| < 1$ હોય, તો $a$ ની કિંમત શોધો.

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

$e^{\left( {x - \frac{1}{2}{(x - 1)}^2 + \frac{1}{3}{(x - 1)}^3 - \frac{1}{4}{(x - 1)}^4 + \dots} \right)}$ ની કિંમત શું થાય?

$\frac{1}{n^2} + \frac{1}{2n^4} + \frac{1}{3n^6} + \dots \infty = $

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