题目内容
若| a |
| b |
| c |
| d |
| e |
| f |
| 2 |
| 3 |
| a+3c |
| b+3d |
| c-e |
| d-f |
分析：若
=
=
=
得到：
=
=
=
=
，根据合比性质求解即可．
| a |
| b |
| c |
| d |
| e |
| f |
| 2 |
| 3 |
| 3c |
| 3d |
| a |
| b |
| c |
| d |
| -e |
| -f |
| 2 |
| 3 |
解答：解：∵
=
=
=
∴
=
=
=
=
根据合比性质得：
=
，
=
．
| a |
| b |
| c |
| d |
| e |
| f |
| 2 |
| 3 |
∴
| 3c |
| 3d |
| a |
| b |
| c |
| d |
| -e |
| -f |
| 2 |
| 3 |
根据合比性质得：
| a+3c |
| b+3d |
| 2 |
| 3 |
| c-e |
| d-f |
| 2 |
| 3 |
点评：本题主要考查了比例的合比性质，对性质的熟练应用是解题的关键．
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