Trong mặt phẳng (P) cho tam giác XYZ cố định . Trê...
Câu hỏi: Trong mặt phẳng (P) cho tam giác XYZ cố định . Trên đường thẳng d vuông góc với mặt phẳng (P) tại điểm X và về hai phía của (P) ta lấy hai điểm A,B thay đổi sao cho hai mặt phẳng (AYZ) (BYZ) luôn vuông góc với nhau. Hỏi vị trí của A,B thỏa mãn điều kiện nào sau đây thì thể tích tứ diện ABYZ là nhỏ nhất.![](data:image/png;base64,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)
A. XB=2XA
B. XA=2XB
C. \(XA.XB = Y{Z^2}\)
D. X là trung điểm của đoạn AB
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG môn Toán 2018 - THPT Chuyên Hùng Vương Bình Dương