已知向量a=(cos2/3x,sin2/3x),b=(cos2/x,-sin2/x),c=(根号3,-1)且x属于R.1,当a向量垂直于b向量时,求x的值得集合2,求a向量-b向量的模的最大值
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![已知向量a=(cos2/3x,sin2/3x),b=(cos2/x,-sin2/x),c=(根号3,-1)且x属于R.1,当a向量垂直于b向量时,求x的值得集合2,求a向量-b向量的模的最大值](/uploads/image/z/324453-21-3.jpg?t=%E5%B7%B2%E7%9F%A5%E5%90%91%E9%87%8Fa%3D%28cos2%2F3x%2Csin2%2F3x%29%2Cb%3D%28cos2%2Fx%2C-sin2%2Fx%29%2Cc%3D%28%E6%A0%B9%E5%8F%B73%2C-1%EF%BC%89%E4%B8%94x%E5%B1%9E%E4%BA%8ER.1%2C%E5%BD%93a%E5%90%91%E9%87%8F%E5%9E%82%E7%9B%B4%E4%BA%8Eb%E5%90%91%E9%87%8F%E6%97%B6%2C%E6%B1%82x%E7%9A%84%E5%80%BC%E5%BE%97%E9%9B%86%E5%90%882%2C%E6%B1%82a%E5%90%91%E9%87%8F-b%E5%90%91%E9%87%8F%E7%9A%84%E6%A8%A1%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC)
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