Cho hai số phức
và
thỏa mãn
. Xét số phức
. Tìm
.
![img1](https://cungthi.online/upload/questionbank3/eduquestion/2018301149974932800/obj2018301149974932800362850_images/obj2018301149974932800362850_img1.png)
![img2](https://cungthi.online/upload/questionbank3/eduquestion/2018301149974932800/obj2018301149974932800362850_images/obj2018301149974932800362850_img2.png)
![img3](https://cungthi.online/upload/questionbank3/eduquestion/2018301149974932800/obj2018301149974932800362850_images/obj2018301149974932800362850_img3.png)
![img4](https://cungthi.online/upload/questionbank3/eduquestion/2018301149974932800/obj2018301149974932800362850_images/obj2018301149974932800362850_img4.png)
![img5](https://cungthi.online/upload/questionbank3/eduquestion/2018301149974932800/obj2018301149974932800362850_images/obj2018301149974932800362850_img5.png)
A.
.
B.
.
C.
.
D.
.
Đáp án và lời giải
Đáp án:A
Lời giải:
Phân tích: Ta có:
Đáp án đúng là A.