જો $\int \frac{x^2-x+2}{x^2+x+2} d x=x-\log (f(x))+\frac{2}{\sqrt{7}} \operatorname{Tan}^{-1}(g(x))+c$ હોય,તો $f(-1)+\sqrt{7} g(-1)=$

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

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Difficult
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જો $\theta$ એવું અસ્તિત્વ ધરાવે છે કે જેથી $a > |\sec \theta|$,તો $\int \frac{dx}{1+a \cos x} = $

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