请写上详细的接替过程...1.已知向量a=(-5,2),b=(-4,3),c=(X,Y),若向量a-2b+3c=0,则向量c=?2.若向量AP=1/3PB,AB=л BP,则л为____3.已知ΔABC三个顶点A,B,C几平面内一点P,若向量PA+PB+PC=AB,则P与ΔABC的位置关系( ) A.P
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![请写上详细的接替过程...1.已知向量a=(-5,2),b=(-4,3),c=(X,Y),若向量a-2b+3c=0,则向量c=?2.若向量AP=1/3PB,AB=л BP,则л为____3.已知ΔABC三个顶点A,B,C几平面内一点P,若向量PA+PB+PC=AB,则P与ΔABC的位置关系( ) A.P](/uploads/image/z/6119124-60-4.jpg?t=%E8%AF%B7%E5%86%99%E4%B8%8A%E8%AF%A6%E7%BB%86%E7%9A%84%E6%8E%A5%E6%9B%BF%E8%BF%87%E7%A8%8B...1.%E5%B7%B2%E7%9F%A5%E5%90%91%E9%87%8Fa%3D%28-5%2C2%29%2Cb%3D%28-4%2C3%29%2Cc%3D%28X%2CY%29%2C%E8%8B%A5%E5%90%91%E9%87%8Fa-2b%2B3c%3D0%2C%E5%88%99%E5%90%91%E9%87%8Fc%3D%3F2.%E8%8B%A5%E5%90%91%E9%87%8FAP%3D1%2F3PB%2CAB%3D%D0%BB+BP%2C%E5%88%99%D0%BB%E4%B8%BA____3.%E5%B7%B2%E7%9F%A5%CE%94ABC%E4%B8%89%E4%B8%AA%E9%A1%B6%E7%82%B9A%2CB%2CC%E5%87%A0%E5%B9%B3%E9%9D%A2%E5%86%85%E4%B8%80%E7%82%B9P%2C%E8%8B%A5%E5%90%91%E9%87%8FPA%2BPB%2BPC%3DAB%2C%E5%88%99P%E4%B8%8E%CE%94ABC%E7%9A%84%E4%BD%8D%E7%BD%AE%E5%85%B3%E7%B3%BB%28+%29+A.P)
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