[問題] 證明題~
(1) (X-1)[X^(n-1)+X^(n-2)+ ... +X^2+X+1] = X^n-1
(2) (X+1)[X^(n-1)-X^(n-2)+X^(n-3)- ... +X^2-X+1] = X^n+1 n是奇數
救救我~~~謝謝XD
(很想砸題目本..
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◆ From: 118.171.177.153
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07/29 10:37, , 1F
07/29 10:37, 1F
0.0我畫了一個問號跳過去了..
※ 編輯: EarthQ 來自: 118.171.177.153 (07/29 10:40)
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07/29 10:40, , 2F
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可是證明阿!這樣證明嗎?? (不懂.. 其實根本不知道他要我幹麻..
※ 編輯: EarthQ 來自: 118.171.177.153 (07/29 10:41)
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※ 編輯: EarthQ 來自: 118.171.177.153 (07/29 14:13)
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