[Mức độ 2] Trong không gian với hệ tọa độ ![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/202048021084332534093/obj202048021084332534093534093_images/obj202048021084332534093534093_img1.png)
,
,
. Viết phương trình mặt cầu tâm
bán kính
.
A.
.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/202048021084332534093/obj202048021084332534093819103_images/obj202048021084332534093819103_img1.png)
B.
.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/202048021084332534093/obj202048021084332534093339264_images/obj202048021084332534093339264_img1.png)
C.
.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/202048021084332534093/obj202048021084332534093178362_images/obj202048021084332534093178362_img1.png)
D.
.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/202048021084332534093/obj202048021084332534093906349_images/obj202048021084332534093906349_img1.png)
Đáp án và lời giải
Đáp án:B
Lời giải:
Ta có
.
Phương trình mặt cầu tâm
bán kính
:
.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/202048021084332534093/obj202048021084332534093887952_images/obj202048021084332534093887952_img1.png)
![img2](https://cungthi.online/upload/questionbank3_20201220/eduquestion/202048021084332534093/obj202048021084332534093887952_images/obj202048021084332534093887952_img2.png)
![img3](https://cungthi.online/upload/questionbank3_20201220/eduquestion/202048021084332534093/obj202048021084332534093887952_images/obj202048021084332534093887952_img3.png)
![img4](https://cungthi.online/upload/questionbank3_20201220/eduquestion/202048021084332534093/obj202048021084332534093887952_images/obj202048021084332534093887952_img4.png)