让我郁闷的证明题!

      ScHOoL 2005-10-30 11:52
求证:1=2.
证明:
   设a=b=1
   ∵a²=ab
   ∴a²-b²=ab-b²
    (a+b)(a-b)=b(a-b)
    a+b=b
   ∴1+1=1
    2=1
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