$\frac{1}{x + 1} + \frac{1}{2(x + 1)^2} + \frac{1}{3(x + 1)^3} + \dots \infty = $

  • A
    $\log_e\left(1 + \frac{1}{x}\right)$
  • B
    $\log_e\left(1 - \frac{1}{x}\right)$
  • C
    $\log_e\left(\frac{x}{x + 1}\right)$
  • D
    આમાંથી કોઈ નહીં

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જો $0 < y < 2^{1/3}$ અને $x(y^3 - 1) = 1$ હોય,તો $\frac{2}{x} + \frac{2}{3x^3} + \frac{2}{5x^5} + \dots$ ની કિંમત શોધો:

અનંત શ્રેણી $\frac{1}{1 \times 2} - \frac{1}{2 \times 3} + \frac{1}{3 \times 4} - \dots \infty$ નો સરવાળો કેટલો થાય?

Difficult
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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?

શ્રેણીનો સરવાળો શોધો: $\log_e \frac{4}{5} + \frac{1}{4} - \frac{1}{2} \left( \frac{1}{4} \right)^2 + \frac{1}{3} \left( \frac{1}{4} \right)^3 - \dots$

જો $0 < a, b < 1$ અને $\tan^{-1} a + \tan^{-1} b = \frac{\pi}{4}$ હોય,તો $(a+b) - \left(\frac{a^2+b^2}{2}\right) + \left(\frac{a^3+b^3}{3}\right) - \left(\frac{a^4+b^4}{4}\right) + \dots$ ની કિંમત ..... છે.

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