题目内容
若a+b+c≠0,
=
=
=k,则k=______.
| b+c |
| a |
| c+a |
| b |
| a+b |
| c |
∵
=
=
=k,a+b+c≠0
∴k=
=2.
故答案为:2.
| b+c |
| a |
| c+a |
| b |
| a+b |
| c |
∴k=
| 2(a+b+c) |
| a+b+c |
故答案为:2.
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题目内容
| b+c |
| a |
| c+a |
| b |
| a+b |
| c |
| b+c |
| a |
| c+a |
| b |
| a+b |
| c |
| 2(a+b+c) |
| a+b+c |