$\int_0^3 (2+x^2) dx = $

  • A
    $\lim _{n \rightarrow \infty} \frac{1}{n} \left[2n + \frac{1^2+2^2+\ldots+(3n)^2}{n^2} \right]$
  • B
    $\lim _{n \rightarrow \infty} \frac{1}{n} \left[3n + \frac{1^2+2^2+\ldots+6n^2}{n^2} \right]$
  • C
    $\lim _{n \rightarrow \infty} \frac{1}{n} \left[6n + \frac{1^2+2^2+\ldots+(3n)^2}{n^2} \right]$
  • D
    $\lim _{n \rightarrow \infty} \frac{1}{n} \left[3n + \frac{1^2+2^2+\ldots+3n^2}{n^2} \right]$

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