题目内容
已知
=
,则
=______.
| x |
| 6 |
| y |
| 2 |
| x+y |
| x-y |
设
=
=k.则x=6k,y=2k,
∴
=
=
=2;
故答案为:2.
| x |
| 6 |
| y |
| 2 |
∴
| x+y |
| x-y |
=
| 6k+2k |
| 6k-2k |
=
| 8 |
| 4 |
=2;
故答案为:2.
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题目内容
| x |
| 6 |
| y |
| 2 |
| x+y |
| x-y |
| x |
| 6 |
| y |
| 2 |
| x+y |
| x-y |
| 6k+2k |
| 6k-2k |
| 8 |
| 4 |