यदि $f(x) = \frac{2 - x \cos x}{2 + x \cos x}$ और $g(x) = \ln x$ $(x > 0)$ है,तो समाकलन $\int_{-\pi/4}^{\pi/4} g(f(x)) dx$ का मान ज्ञात कीजिए।

  • A
    $\ln 1$
  • B
    $\ln 2$
  • C
    $\ln e$
  • D
    $\ln 3$

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मान लीजिए कि $f:R \to R$ और $g:R \to R$ सतत फलन हैं,तो समाकलन $\int_{-\pi/2}^{\pi/2} [f(x) + f(-x)][g(x) - g(-x)] \, dx$ का मान क्या होगा?

$\int\limits_{ - 1}^1 {\frac{{{x^3} + |x| + 1}}{{{x^2} + 2|x| + 1}}} dx = a \ln 2 + b$,तो:

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