Giữa hệ số nở khối
và hệ số nở dài
có biểu thức:
A.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/2019330895365996293/obj2019330895365996293836070_images/obj2019330895365996293836070_img1.png)
B.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/2019330895365996293/obj2019330895365996293263184_images/obj2019330895365996293263184_img1.png)
C.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/2019330895365996293/obj2019330895365996293328174_images/obj2019330895365996293328174_img1.png)
D.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/2019330895365996293/obj2019330895365996293470679_images/obj2019330895365996293470679_img1.png)
Đáp án và lời giải
Đáp án:D
Lời giải:Phân tích:
Biểu thức liên hệ:
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/2019330895365996293/obj2019330895365996293687764_images/obj2019330895365996293687764_img1.png)