如图,锐角三角形ABC的外接圆的圆心为点O,点M为边BC上的中点,有顶点A做AG⊥BC并在AG上取一点H,使向量AH=2向量OM,又点H,M在直线BC的同一侧,且向量OA=a,向量OB=b,向量OC=c(1)用a,b,c表示向量OM与向量O
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![如图,锐角三角形ABC的外接圆的圆心为点O,点M为边BC上的中点,有顶点A做AG⊥BC并在AG上取一点H,使向量AH=2向量OM,又点H,M在直线BC的同一侧,且向量OA=a,向量OB=b,向量OC=c(1)用a,b,c表示向量OM与向量O](/uploads/image/z/11668700-20-0.jpg?t=%E5%A6%82%E5%9B%BE%2C%E9%94%90%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E5%A4%96%E6%8E%A5%E5%9C%86%E7%9A%84%E5%9C%86%E5%BF%83%E4%B8%BA%E7%82%B9O%2C%E7%82%B9M%E4%B8%BA%E8%BE%B9BC%E4%B8%8A%E7%9A%84%E4%B8%AD%E7%82%B9%2C%E6%9C%89%E9%A1%B6%E7%82%B9A%E5%81%9AAG%E2%8A%A5BC%E5%B9%B6%E5%9C%A8AG%E4%B8%8A%E5%8F%96%E4%B8%80%E7%82%B9H%2C%E4%BD%BF%E5%90%91%E9%87%8FAH%3D2%E5%90%91%E9%87%8FOM%2C%E5%8F%88%E7%82%B9H%2CM%E5%9C%A8%E7%9B%B4%E7%BA%BFBC%E7%9A%84%E5%90%8C%E4%B8%80%E4%BE%A7%2C%E4%B8%94%E5%90%91%E9%87%8FOA%3Da%2C%E5%90%91%E9%87%8FOB%3Db%2C%E5%90%91%E9%87%8FOC%3Dc%EF%BC%881%EF%BC%89%E7%94%A8a%2Cb%2Cc%E8%A1%A8%E7%A4%BA%E5%90%91%E9%87%8FOM%E4%B8%8E%E5%90%91%E9%87%8FO)
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