$\int {\frac{{\sec x(1 + \tan x)dx}}{{({e^{ - x}} + \sec x)}}} = f(x) + C$ જ્યાં $f(0) = \ln 2$ હોય,તો $f\left( {\frac{\pi }{4}} \right)$ શું થાય?

  • A
    $\ln \left( {1 + {e^{\frac{\pi }{4}}}\sqrt 2 } \right)$
  • B
    $\ln \left( {\sqrt 2 } \right)$
  • C
    $\ln \left( {2\sqrt 2 } \right)$
  • D
    $\ln \left( {\frac{{{e^{\frac{\pi }{4}}}}}{{\sqrt 2 }} + 1} \right)$

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