Nghiệm của phương trình
là:
A.
.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/2019560484262836885/obj2019560484262836885560891_images/obj2019560484262836885560891_img1.png)
B.
.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/2019560484262836885/obj2019560484262836885814839_images/obj2019560484262836885814839_img1.png)
C.
.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/2019560484262836885/obj2019560484262836885895290_images/obj2019560484262836885895290_img1.png)
D.
.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/2019560484262836885/obj2019560484262836885724728_images/obj2019560484262836885724728_img1.png)
Đáp án và lời giải
Đáp án:B
Lời giải:Chọn B
.
Vậy đáp án đúng là B.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/2019560484262836885/obj2019560484262836885613215_images/obj2019560484262836885613215_img1.png)