题目内容
设x,y为实数,且
+
=
,则x+y=______.
| x |
| 1-i |
| y |
| 1-2i |
| 5 |
| 1-3i |
| x |
| 1-i |
| y |
| 1-2i |
| x(1+i) |
| 2 |
| y(1+2i) |
| 5 |
| x |
| 2 |
| y |
| 5 |
| x |
| 2 |
| 2y |
| 5 |
而
| 5 |
| 1-3i |
| 5(1+3i) |
| 10 |
| 1 |
| 2 |
| 3 |
| 2 |
| x |
| 2 |
| y |
| 5 |
| 1 |
| 2 |
| x |
| 2 |
| 2y |
| 5 |
| 3 |
| 2 |
解得x=-1,y=5,
所以x+y=4.
故答案为:4
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题目内容
| x |
| 1-i |
| y |
| 1-2i |
| 5 |
| 1-3i |
| x |
| 1-i |
| y |
| 1-2i |
| x(1+i) |
| 2 |
| y(1+2i) |
| 5 |
| x |
| 2 |
| y |
| 5 |
| x |
| 2 |
| 2y |
| 5 |
| 5 |
| 1-3i |
| 5(1+3i) |
| 10 |
| 1 |
| 2 |
| 3 |
| 2 |
| x |
| 2 |
| y |
| 5 |
| 1 |
| 2 |
| x |
| 2 |
| 2y |
| 5 |
| 3 |
| 2 |