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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 12: A(0;-1;2) B(2;-3;0) C(-2;1;1) D(0;-1;3) quỹ tích M sao cho $\overrightarrow{MA}$.$\overrightarrow{MB}$=$\overrightarrow{MC}$.$\overrig

Toán Lớp 12: A(0;-1;2) B(2;-3;0) C(-2;1;1) D(0;-1;3) quỹ tích M sao cho $\overrightarrow{MA}$.$\overrightarrow{MB}$=$\overrightarrow{MC}$.$\overrightarrow{MD}$=1 là đường tròn có bán kính bằng?

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222-9+11+12:2*14+14 = ? ( )