Cho hai đường tròn (C): $x^{2}+y^2=2$, (C'): $x^2+y^2=5$, $A(0;1)$, Tìm điểm B, C thuộc (C) và (C') sao cho tam giác ABC có diện tích lớn nhất, nhỏ nhất.

bị xóa vì bị trùng bởi Đức Vỹ 27-10-13 01:26 PM

Câu hỏi này có nội dung hoàn toàn trùng với câu hỏi đã có.

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