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原式=3的2010次方×(3²-3-1) =3的2010次方×5 所以能被5整除
3的2012次方-4*3的2011次方+10*3的2010次方 =3的2010次方×(3²-4×3+10) =3的2010次方×7 所以一定能被7整除
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