निरीक्षण विधि द्वारा फलन $\sin 2x - 4e^{3x}$ का प्रति-अवकलज (या समाकल) ज्ञात कीजिए।

  • A
    $-\frac{1}{2} \cos 2x - \frac{4}{3} e^{3x}$
  • B
    $-\frac{1}{2} \cos 2x + \frac{4}{3} e^{3x}$
  • C
    $\frac{1}{2} \cos 2x - \frac{4}{3} e^{3x}$
  • D
    $\frac{1}{2} \cos 2x + \frac{4}{3} e^{3x}$

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$\int \frac{1}{1+\cos 8x} dx$ का मान है

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