- Dec 24 Wed 2008 20:55
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有深度ㄉMATH問題2
- Dec 24 Wed 2008 20:42
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有深度ㄉMATH問題
若t=x+1/x,則x4x3-4x2+x+1=0變成: {推甄}
(A)x2(t2+t-2)=0
(A)x2(t2+t-2)=0
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