在△ABC中,点O是BC的中点,过点O的直线交AB,AC于不同的两点M,N,若AB=mAM,AC=nAN,求m+n的值AB,AM,AC,AN为向量,m,n为实数是交AB延长线与线段AC于MN两点
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![在△ABC中,点O是BC的中点,过点O的直线交AB,AC于不同的两点M,N,若AB=mAM,AC=nAN,求m+n的值AB,AM,AC,AN为向量,m,n为实数是交AB延长线与线段AC于MN两点](/uploads/image/z/7273242-18-2.jpg?t=%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2C%E7%82%B9O%E6%98%AFBC%E7%9A%84%E4%B8%AD%E7%82%B9%2C%E8%BF%87%E7%82%B9O%E7%9A%84%E7%9B%B4%E7%BA%BF%E4%BA%A4AB%2CAC%E4%BA%8E%E4%B8%8D%E5%90%8C%E7%9A%84%E4%B8%A4%E7%82%B9M%2CN%2C%E8%8B%A5AB%3DmAM%2CAC%3DnAN%2C%E6%B1%82m%2Bn%E7%9A%84%E5%80%BCAB%2CAM%2CAC%2CAN%E4%B8%BA%E5%90%91%E9%87%8F%2Cm%2Cn%E4%B8%BA%E5%AE%9E%E6%95%B0%E6%98%AF%E4%BA%A4AB%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%B8%8E%E7%BA%BF%E6%AE%B5AC%E4%BA%8EMN%E4%B8%A4%E7%82%B9)
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