$\frac{1}{2} - \frac{1}{2 \cdot 2^2} + \frac{1}{3 \cdot 2^3} - \frac{1}{4 \cdot 2^4} + \ldots$ का मान ज्ञात कीजिए।

  • A
    $\frac{1}{4}$
  • B
    $\log _3\left(\frac{3}{4}\right)$
  • C
    $\log _e\left(\frac{3}{2}\right)$
  • D
    $\log _e\left(\frac{2}{3}\right)$

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अनंत श्रेणी $\frac{1}{1 \times 2} - \frac{1}{2 \times 3} + \frac{1}{3 \times 4} - \dots \infty$ का योग किसके बराबर है?

Difficult
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$\log_e \frac{1}{1 - x - x^2 + x^3}$ के विस्तार में,$x$ का गुणांक है

यदि $\tanh ^{-1} x = a \log \left(\frac{1+x}{1-x}\right)$, $|x| < 1$ है, तो $a$ का मान ज्ञात कीजिए।

यदि $P = 1 + \frac{1}{2 \times 2} + \frac{1}{3 \times 2^{2}} + \dots$ और $Q = \frac{1}{1 \times 2} + \frac{1}{3 \times 4} + \frac{1}{5 \times 6} + \dots$ है, तो

यदि $-\frac{\pi}{2} < \theta < \frac{\pi}{2}$ है,तो $\log \left(\tan \left(\frac{\pi}{4}+\frac{\theta}{2}\right)\right)=$

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