Cho hình chóp
có đáy
là hình vuông tâm
Gọi
và
lần lượt là trung điểm của
. Tỷ số thể tích
bằng
![img1](https://cungthi.online/upload/questionbank3/eduquestion/2019111190154873775/obj2019111190154873775873775_images/obj2019111190154873775873775_img1.png)
![img2](https://cungthi.online/upload/questionbank3/eduquestion/2019111190154873775/obj2019111190154873775873775_images/obj2019111190154873775873775_img2.png)
![img3](https://cungthi.online/upload/questionbank3/eduquestion/2019111190154873775/obj2019111190154873775873775_images/obj2019111190154873775873775_img3.png)
![img4](https://cungthi.online/upload/questionbank3/eduquestion/2019111190154873775/obj2019111190154873775873775_images/obj2019111190154873775873775_img4.png)
![img5](https://cungthi.online/upload/questionbank3/eduquestion/2019111190154873775/obj2019111190154873775873775_images/obj2019111190154873775873775_img5.png)
![img6](https://cungthi.online/upload/questionbank3/eduquestion/2019111190154873775/obj2019111190154873775873775_images/obj2019111190154873775873775_img6.png)
![img7](https://cungthi.online/upload/questionbank3/eduquestion/2019111190154873775/obj2019111190154873775873775_images/obj2019111190154873775873775_img7.png)
A.
B.
C.
D.
Đáp án và lời giải
Đáp án:D
Lời giải:
Phân tích:
Ta có:
,
. Tương tự:
. Vậy
Đáp án đúng là D