y=x4−2(m+1)x2+m2
Tìm m có 3 cực trị A,B,C. A thuộc Oy
1) 3 cực trị OA=BC
2) Tam giác ABC vuông cân
3) tam giác đều
4) tam giác có S=4√2
5) tam giác có một góc = 120 ° 
6) tam giác có chu vi đường tròn ngoại tiếp = 2 Π
7) O là trọng tâm
8) Khảo sát m=1

bị xóa vì bị trùng bởi Đức Vỹ 27-10-13 12:57 PM

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

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