1 . 计算:
(1)(1+2i)+(7-11i)-(5+6i);
(2)
;
(3)
.
(1)(1+2i)+(7-11i)-(5+6i);
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea313640c6ffe494a7d2e3b6037a260e.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/229719e1c3ed7a56e342439f02c1f300.png)
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2 . 计算下列各式:
(1)
;
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425d2134238691f7bde2f6606e83f59e.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6185e160db32ccfa5e5c4071e239c574.png)
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3 . 计算:(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3027b671fb4419b9055eda8329fa2279.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80065a402c555d8dcf7aba21841e368c.png)
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