MCQ
$\int \frac{x^4-1}{x^2+1} d x=$
  • A
    $\frac{x^3}{3}+2 x+k$
  • B
    $\frac{x^3}{3}-2 x+k$
  • C
    $\frac{x^3}{3}+x+k$
  • $\frac{x^3}{3}-x+k$

Answer

Correct option: D.
$\frac{x^3}{3}-x+k$
D

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