यदि $\int \frac{e^x}{\sqrt{e^{2x}+4e^x+13}} dx = \log \left|e^{ax}+2+\sqrt{e^{2x}+4e^x+13}\right|+c$ है,(जहाँ $c$ समाकलन का स्थिरांक है),तो $a$ का मान ज्ञात कीजिए।

  • A
    $0$
  • B
    $1$
  • C
    $2$
  • D
    $3$

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यदि $f_n(x) = \log \log \log \ldots \log x$ (जहाँ $\log$ $n$ बार दोहराया गया है), तो $\int (x f_1(x) f_2(x) \ldots f_n(x))^{-1} dx$ का मान ज्ञात कीजिए।

$f(x) = x \cdot 2^{\ln(x^2 + 1)}$ का $x$ के सापेक्ष समाकलन (primitive) ज्ञात कीजिए।

$\int \frac{1+2 e^{-x}}{1-2 e^{-x}} d x=$

$\int \frac{dx}{x\sqrt{1 - (\log x)^2}} = $

यदि $l^r(x)$,$x$ का $r$-वां पुनरावृत्त लघुगणक (iterated logarithm) दर्शाता है,अर्थात $l^1(x) = \log(x)$,$l^2(x) = \log(\log(x))$,...,$l^r(x) = \log(\log(...\log(x)...))$,तो $\int \frac{1}{x \cdot l^1(x) \cdot l^2(x) \cdot ... \cdot l^r(x)} \, dx = $

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