三角形ABC内任意一点O,三角形OBC、OAC、OAB的面积分别是S1、S2、S3,证明s1*OA+S2*OB+S3*OC=0向量设向量OA.向量OB.向量OC方向上的单位向量分别为向量a0,向量b0,向量c0
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![三角形ABC内任意一点O,三角形OBC、OAC、OAB的面积分别是S1、S2、S3,证明s1*OA+S2*OB+S3*OC=0向量设向量OA.向量OB.向量OC方向上的单位向量分别为向量a0,向量b0,向量c0](/uploads/image/z/15222271-31-1.jpg?t=%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E5%86%85%E4%BB%BB%E6%84%8F%E4%B8%80%E7%82%B9O%2C%E4%B8%89%E8%A7%92%E5%BD%A2OBC%E3%80%81OAC%E3%80%81OAB%E7%9A%84%E9%9D%A2%E7%A7%AF%E5%88%86%E5%88%AB%E6%98%AFS1%E3%80%81S2%E3%80%81S3%2C%E8%AF%81%E6%98%8Es1%2AOA%2BS2%2AOB%2BS3%2AOC%3D0%E5%90%91%E9%87%8F%E8%AE%BE%E5%90%91%E9%87%8FOA.%E5%90%91%E9%87%8FOB.%E5%90%91%E9%87%8FOC%E6%96%B9%E5%90%91%E4%B8%8A%E7%9A%84%E5%8D%95%E4%BD%8D%E5%90%91%E9%87%8F%E5%88%86%E5%88%AB%E4%B8%BA%E5%90%91%E9%87%8Fa0%2C%E5%90%91%E9%87%8Fb0%2C%E5%90%91%E9%87%8Fc0)
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