Số phức z = -(1+3i) có môđun là:
A. 10
B. – 10
C. ![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/202002208798056330074/image202002208798056330074850566_images/image202002208798056330074850566_img1.png)
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/202002208798056330074/image202002208798056330074850566_images/image202002208798056330074850566_img1.png)
D. - ![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/202002208798056330074/image202002208798056330074376597_images/image202002208798056330074376597_img1.png)
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/202002208798056330074/image202002208798056330074376597_images/image202002208798056330074376597_img1.png)
Đáp án và lời giải
Đáp án:C