ધારો કે $\alpha$ અને $\beta$ એ $5x^2 - 3x - 1 = 0$ ના બીજ છે. તો પદાવલિ $\left[ (\alpha + \beta)x - \left( \frac{\alpha^2 + \beta^2}{2} \right)x^2 + \left( \frac{\alpha^3 + \beta^3}{3} \right)x^3 - \dots \right]$ બરાબર શું થાય?

  • A
    $\ln(1 - \frac{3}{5}x - \frac{1}{5}x^2)$
  • B
    $\ln(1 + \frac{3}{5}x - \frac{1}{5}x^2)$
  • C
    $\ln(1 - \frac{3}{5}x + \frac{1}{5}x^2)$
  • D
    આપેલ પૈકી કોઈ નહીં

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

જો $x = \operatorname{sech}^{-1} \frac{1}{2} + \tanh^{-1} \frac{1}{2}$ હોય,તો $\cosh x =$

$|x| < 1$ માટે,$x$ ની ચડતી ઘાતમાં $\log(1+x+x^2)$ ના વિસ્તરણમાં $x^3$ નો સહગુણક શું છે ($/3$ માં)?

$1 + \frac{2}{3} - \frac{2}{4} + \frac{2}{5} - \dots \infty = $

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