题目内容
若3
-2(
-
)=0,则向量
等于( )
| x |
| x |
| a |
| x |
A.2
| B.-2
| C.
| D.-
|
∵3
-2(
-
)=
,∴
+2
=
.解得
=-2
.
故选B.
| x |
| x |
| a |
| 0 |
| x |
| a |
| 0 |
| x |
| a |
故选B.
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题目内容
| x |
| x |
| a |
| x |
A.2
| B.-2
| C.
| D.-
|
| x |
| x |
| a |
| 0 |
| x |
| a |
| 0 |
| x |
| a |