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Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 已解決
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國一數學問題~數線 10點
Aug 22nd 2013, 13:42

(1)數線上3點，A(a)、B(-50)、C(-100)，若已知線段AB+線段AC=70，則A點的可能座 標為?

(2)A(-45)、B(27)為數線上相異的兩點：
A.B兩點應同時向右移動多少個單位長後，其新座標才會互為相反數?

(3)已知數線上A.B兩點的座標分別為-5、28，若將線段AB分成11等分，且C點在左邊 算起第三個等分點上，試求：
(題目所說的C點在左邊算起第三個等分點上，是從左到右→，還是又到左←數起?)

線段AC.線段BC各為多少個單位長?

求講解和答案喔~謝謝 :))

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