જો $\int \frac{e^x}{\sqrt{e^{2x}+4e^x+13}} dx = \log \left|e^{ax}+2+\sqrt{e^{2x}+4e^x+13}\right|+c$ હોય,(જ્યાં $c$ એ સંકલનનો અચળાંક છે),તો $a$ ની કિંમત શોધો.

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

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