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Toán 12: Trong không gian Oxyz, cho mặt cầu (S): (x-2)^2+(y-1)^2+(z+3)^2 =11 và điểm A(-1;-2;0)
2 months ago
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Trong không gian Oxyz, cho mặt cầu (S): (x-2)^2+(y-1)^2+(z+3)^2 =11 và điểm
A(-1;-2;0). Gọi (C) là đường tròn giao tuyến giữa mặt cầu (S) và mặt phẳng (Oxy). Biết M (a;b;0) ∈(C) sao cho đoạn thẳng AM có độ dài lớn nhất. Giá trị của biểu thức 2a−b bằng bao nhiêu?
#ToanLop12
#HinhHocKhongGianOxyz
#OxyzGeometry
#CachGiai
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