$\int \frac{x^3}{\sqrt{x^2 + 2}} \, dx = $

  • A
    $\frac{1}{3}(x^2 + 2)^{3/2} + 2(x^2 + 2)^{1/2} + c$
  • B
    $\frac{1}{3}(x^2 + 2)^{3/2} - 2(x^2 + 2)^{1/2} + c$
  • C
    $\frac{1}{3}(x^2 + 2)^{3/2} + (x^2 + 2)^{1/2} + c$
  • D
    $\frac{1}{3}(x^2 + 2)^{3/2} - (x^2 + 2)^{1/2} + c$

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