题目
题型：不详难度：来源：
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| b |
| a |
| b |
| a |
| b |
答案
| a |
| b |
| a |
| b |
∴
| a |
| b |
∴|
| a |
| b |
| a |
| a |
| b |
| b |
∴|
| a |
| b |
| 7 |
故答案为
| 7 |
核心考点
试题【平面向量a与b的夹角为60°，a=（2，0），|b|=1，则|a+b|=______．】；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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| 5 |
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| b |
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| b |
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| b |
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| b |
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| b |
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| a |
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| b |
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| 7 |
| 7 |
| a |
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| a |
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| a |
| b |
| a |
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| a |
| b |
，则向量a与b之间的夹角