Nghiệm của phương trình
là:
A.
.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/2019560484260977331/obj2019560484260977331297562_images/obj2019560484260977331297562_img1.png)
B.
.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/2019560484260977331/obj2019560484260977331127000_images/obj2019560484260977331127000_img1.png)
C.
.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/2019560484260977331/obj2019560484260977331554445_images/obj2019560484260977331554445_img1.png)
D.
.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/2019560484260977331/obj2019560484260977331238443_images/obj2019560484260977331238443_img1.png)
Đáp án và lời giải
Đáp án:C
Lời giải:Chọn C
.
Vậy đáp án đúng là C.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/2019560484260977331/obj2019560484260977331272370_images/obj2019560484260977331272370_img1.png)