LA_01_02 page 6 的公式1 ,e2是不是写错了: <img width="835" height="311" alt="Image" src="https://github.com/user-attachments/assets/36dc1bea-2435-4619-a30e-5321a7964248" />
LA_01_02 page 6 的公式1 ,e2是不是写错了: