等边三角形ABC中,点M,N分别在AB,AC,上,且AN=BM,BN与CM相交于点O,若S三角形ABC=7,S三角形OBC=2,则BM比BA=几?
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![等边三角形ABC中,点M,N分别在AB,AC,上,且AN=BM,BN与CM相交于点O,若S三角形ABC=7,S三角形OBC=2,则BM比BA=几?](/uploads/image/z/1811647-55-7.jpg?t=%E7%AD%89%E8%BE%B9%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2C%E7%82%B9M%2CN%E5%88%86%E5%88%AB%E5%9C%A8AB%2CAC%2C%E4%B8%8A%2C%E4%B8%94AN%3DBM%2CBN%E4%B8%8ECM%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9O%2C%E8%8B%A5S%E4%B8%89%E8%A7%92%E5%BD%A2ABC%3D7%2CS%E4%B8%89%E8%A7%92%E5%BD%A2OBC%3D2%2C%E5%88%99BM%E6%AF%94BA%3D%E5%87%A0%3F)
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