(要过程)《做得好的给50-100财富

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(要过程)《做得好的给50-100财富
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(要过程)《做得好的给50-100财富
(要过程)《做得好的给50-100财富

(要过程)《做得好的给50-100财富
令t=2011(方便做题,可以不设)
原式=(t^3-2t^2+1)/(t^3-3t^2+t+2)\
=[t^3-t^2-(t^2-1)]/[t^3-2t^2-(t^2-t-2)]
=[t^2(t-1)-(t+1)(t-1)]/[t^2(t-2)-(t+1)(t-2)]
=[(t-1)(t^2-t-1)]/[(t-2)(t^2-t-1)]
=(t-1)/(t-2)=2010/2009

= [2011^2*(2011-1)-(2011-1)(2011+1)] / [(2011^3-2*2011^2)-(2011^2-2011-2)]
= (2011-1)(2011^2-2011-1) / [2011^2(2011-2)-(2011-2)(2011+1)]
= (2011-1)(2011^2-2011-1) / [(2011-2)(2011^2-2011-1)]
= (2011-1) / (2011-2)
= 2010 / 2009

简单