题目内容
已知向量
=(1,
),
=(x-1,1),则|
+
|的最小值是( )
| a |
| 1-x |
| x |
| b |
| a |
| b |
| A.1 | B.
| C.
| D.2 |
| a |
| b |
| 1-x |
| x |
| 1 |
| x |
故|
| a |
| b |
x2+
|
| 2 |
| a |
| b |
| 2 |
故选:B.
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题目内容
| a |
| 1-x |
| x |
| b |
| a |
| b |
| A.1 | B.
| C.
| D.2 |
| a |
| b |
| 1-x |
| x |
| 1 |
| x |
| a |
| b |
x2+
|
| 2 |
| a |
| b |
| 2 |