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haiyennguyen030901
2 năm trước
Câu 5:Cho 2 điểm M,N nằm trên đường tròn đường kính AB=2R.Gọi I là giao điểm của hai đường thẳng AM và BN. a)CM: vectơ AM.AI=vectơ AB.AI vectơ BN.BI=vectơ BA.BI b)Tính vectơ AM.AI+vectơ BN.BI theo R
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