Let $H(x)=3x^4+6x^3-2x^2+1$ and $g(x)$ be a polynomial of degree one. If $\frac{H(x)}{(x-1)(x+1)(x-2)}=f(x)+\frac{g(x)}{(x-1)(x+1)(x-2)}$,then $H(-1)+2H(2)-3H(1)=$

  • A
    $f(-1)+2f(2)-3f(1)$
  • B
    $H(-1)+f(2)+g(3)$
  • C
    $g(-1)+2g(2)-3g(1)$
  • D
    $H(1)+2f(2)-g(1)$

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