If $\int_{a}^{x} t y(t) dt = x^2 + y(x)$,then $y$ as a function of $x$ is:

  • A
    $y = 2 - (2 + a^2) e^{\frac{x^2 - a^2}{2}}$
  • B
    $y = 1 - (2 + a^2) e^{\frac{x^2 - a^2}{2}}$
  • C
    $y = 2 - (1 + a^2) e^{\frac{x^2 - a^2}{2}}$
  • D
    None of these

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