题目
题型：汕头模拟难度：来源：
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A．
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答案
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∴(
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(
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①②联立可得
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设
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∵θ∈[0，π]∴θ=
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故选B
核心考点
试题【已知a、b是非零向量且满足（a-2b）⊥a，（b-2a）⊥b，则a与b的夹角是（ ）A．π6B．π3C．2π3D．5π6】；主要考察你对平面向量模和夹角的坐标表示等知识点的理解。[详细]
举一反三
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（1）求向量
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（2）求向量
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（1）当x=
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（2）若x∈[
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①向量
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| A．1个 | B．2个 | C．3个 | D．4个 |
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A．
| B．
| C．-
| D．-
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