三角形ABC中,AB=AC,BC=2,D、E分别在AC、AB上且AD=DC,AE=1/2EB,向量BD乘向量AC=-1/2,求向量CE·AB的值
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![三角形ABC中,AB=AC,BC=2,D、E分别在AC、AB上且AD=DC,AE=1/2EB,向量BD乘向量AC=-1/2,求向量CE·AB的值](/uploads/image/z/5203228-4-8.jpg?t=%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2CAB%3DAC%2CBC%3D2%2CD%E3%80%81E%E5%88%86%E5%88%AB%E5%9C%A8AC%E3%80%81AB%E4%B8%8A%E4%B8%94AD%3DDC%2CAE%3D1%2F2EB%2C%E5%90%91%E9%87%8FBD%E4%B9%98%E5%90%91%E9%87%8FAC%3D-1%2F2%2C%E6%B1%82%E5%90%91%E9%87%8FCE%C2%B7AB%E7%9A%84%E5%80%BC)
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