若等边三角形的边长为2根号3,平面内一点M满足向量CM=1/6向量CB+2/3向量CA,则向量M
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/28 05:58:53
![若等边三角形的边长为2根号3,平面内一点M满足向量CM=1/6向量CB+2/3向量CA,则向量M](/uploads/image/z/1500722-26-2.jpg?t=%E8%8B%A5%E7%AD%89%E8%BE%B9%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E8%BE%B9%E9%95%BF%E4%B8%BA2%E6%A0%B9%E5%8F%B73%2C%E5%B9%B3%E9%9D%A2%E5%86%85%E4%B8%80%E7%82%B9M%E6%BB%A1%E8%B6%B3%E5%90%91%E9%87%8FCM%3D1%2F6%E5%90%91%E9%87%8FCB%2B2%2F3%E5%90%91%E9%87%8FCA%2C%E5%88%99%E5%90%91%E9%87%8FM)
若等边三角形的边长为2根号3,平面内一点M满足向量CM=1/6向量CB+2/3向量CA,则向量M
若等边三角形的边长为2根号3,平面内一点M满足向量CM=1/6向量CB+2/3向量CA,则向量M
若等边三角形的边长为2根号3,平面内一点M满足向量CM=1/6向量CB+2/3向量CA,则向量M
设c(0,0),B(2根号3,0),A(根号3,3)
CB=2根号3i,CA=根号3i+3j
CM=根号3/3i+2根号3/3i+2j=根号3i+2j-->M(根号3,2)
MA=j,MB=-根号3i+2j
数量积=2