$\int \frac{3x+2}{4x^2+4x+5} dx = A \log(4x^2+4x+5) + B \tan^{-1}\left(\frac{2x+1}{2}\right) + c$,तो $A+B=$

  • A
    $\frac{1}{2}$
  • B
    $\frac{3}{4}$
  • C
    $\frac{3}{8}$
  • D
    $\frac{1}{8}$

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यदि $\int \sec ^2 x \operatorname{cosec}^4 x \, dx = -\frac{1}{3} \cot ^3 x + k \tan x - 2 \cot x + C$ है,तो $k$ का मान ज्ञात कीजिए।

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