If \( \int x^{2} e^{-2 x} d x=e^{-2 x}\left(a x^{2}+b x+c\right)+d ...

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If \( \int x^{2} e^{-2 x} d x=e^{-2 x}\left(a x^{2}+b x+c\right)+d \), then the
\( \mathrm{P}^{12} \)
W. value of \( |a / b c| \) is
(1) 1
(2) 2
(3) 3
(4) 4
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