समीकरण $2 \cosh 2x + 10 \sinh 2x = 5$ का हल है

  • A
    $\frac{1}{2} \log \left(\frac{3}{5}\right)$
  • B
    $\frac{1}{2} \log \left(\frac{4}{3}\right)$
  • C
    $\frac{1}{2} \log \left(\frac{5}{4}\right)$
  • D
    $\frac{1}{2} \log \left(\frac{5}{3}\right)$

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श्रेणी $1 + \frac{1}{4 \cdot 2!} + \frac{1}{16 \cdot 4!} + \frac{1}{64 \cdot 6!} + \dots$ का अनंत तक योग क्या है?

श्रेणी $\frac{1}{2 !} + \frac{1+2}{3 !} + \frac{1+2+3}{4 !} + \ldots$ का योग किसके बराबर है?

यदि ${T_n} = \frac{{{3^n}}}{{2(n!)}} - \frac{1}{{2(n!)}}$ है,तो ${S_\infty } = $

$1 + \frac{a - bx}{1!} + \frac{(a - bx)^2}{2!} + \frac{(a - bx)^3}{3!} + \dots \infty = $

$\sum_{k=1}^{\infty}(-1)^{k+1}(\frac{k(k+1)}{k!})$ का मान है :

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