જો $\alpha, \beta$ એ સમીકરણ $x^2 - px + q = 0$ ના બીજ હોય,તો $\log_e(1 + px + qx^2) = $

  • A
    $(\alpha + \beta)x - \frac{\alpha^2 + \beta^2}{2}x^2 + \frac{\alpha^3 + \beta^3}{3}x^3 - \dots \infty$
  • B
    $(\alpha + \beta)x - \frac{(\alpha + \beta)^2}{2}x^2 + \frac{(\alpha + \beta)^3}{3}x^3 - \dots \infty$
  • C
    $(\alpha + \beta)x + \frac{\alpha^2 + \beta^2}{2}x^2 + \frac{\alpha^3 + \beta^3}{3}x^3 + \dots \infty$
  • D
    આમાંથી કોઈ નહીં

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શ્રેણી $x \log _e a + \frac{x^3}{3!} (\log _e a)^3 + \frac{x^5}{5!} (\log _e a)^5 + \dots$ નું મૂલ્ય શું છે?

$\frac{m - n}{m + n} + \frac{1}{3}\left( \frac{m - n}{m + n} \right)^3 + \frac{1}{5}\left( \frac{m - n}{m + n} \right)^5 + \dots \infty = $

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

$1+\frac{1}{3 \cdot 2^2}+\frac{1}{5 \cdot 2^4}+\frac{1}{7 \cdot 2^6}+\ldots$ ની કિંમત શોધો.

$\frac{1}{1 \cdot 3} + \frac{1}{2 \cdot 5} + \frac{1}{3 \cdot 7} + \frac{1}{4 \cdot 9} + \dots$ ની કિંમત શોધો.

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