$\text{यदि } \int x[\log (1+x)]^3 dx = \frac{(1+x)^2}{16}(f(x)) + (1+x)(g(x)), \text{ तो } f(x) + g(x) = $

  • A
    $\log (1+x)[6 + 9(\log (1+x)) - 7(\log (1+x))^2] + C$
  • B
    $\log (1+x) x^3 + 7(\log (1+x))^2 + 4 \log (1+x) + C$
  • C
    $12 - 18 \log (1+x) + 15(\log (1+x))^2 - 9(\log (1+x))^3 + C$
  • D
    $6 \log (1+x) - 9(\log (1+x))^2 + 7(\log (1+x))^3 + C$

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