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Toán 12: Một vật di chuyển với gia tốc a(t) =-20/(1+2t)^2 (m/s²) .Khi t = 0 thì vận tốc của vật
5 months ago
28
Trong không gian tọa độ Oxyz cho 3 điểm A(0;2;1),B(1;0;2)
C(2;1;-3).Tập hợp các điểm thỏa mãn MA^2+MB^2+MC^2=20 là một mặt cầu
Bán kính mặt cầu đó là
#TOanLop12
#hinhhockhonggianoxyz
#OXyzGeometry
#CachGiai
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