三角形形状问题(向量)O是三角巷ABC所在平面内衣店,且满足(向量OB.向量OC)(向量OB+向量OC-2向量OA)=0,问三角形ABC是什么三角形?
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![三角形形状问题(向量)O是三角巷ABC所在平面内衣店,且满足(向量OB.向量OC)(向量OB+向量OC-2向量OA)=0,问三角形ABC是什么三角形?](/uploads/image/z/12527800-16-0.jpg?t=%E4%B8%89%E8%A7%92%E5%BD%A2%E5%BD%A2%E7%8A%B6%E9%97%AE%E9%A2%98%EF%BC%88%E5%90%91%E9%87%8F%EF%BC%89O%E6%98%AF%E4%B8%89%E8%A7%92%E5%B7%B7ABC%E6%89%80%E5%9C%A8%E5%B9%B3%E9%9D%A2%E5%86%85%E8%A1%A3%E5%BA%97%2C%E4%B8%94%E6%BB%A1%E8%B6%B3%28%E5%90%91%E9%87%8FOB.%E5%90%91%E9%87%8FOC%EF%BC%89%EF%BC%88%E5%90%91%E9%87%8FOB%2B%E5%90%91%E9%87%8FOC-2%E5%90%91%E9%87%8FOA%EF%BC%89%3D0%2C%E9%97%AE%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E6%98%AF%E4%BB%80%E4%B9%88%E4%B8%89%E8%A7%92%E5%BD%A2%3F)
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