Urgent! Help needed on Math Problem.

H
Happyyl
楼主 (文学峸)
Can anyone help to check the correctness of this math derivation? Homework is past due!


 

π
π
呵呵,是对的,不过正象你说的,Past Due了
晒太阳的花栗鼠
数学学霸的圣诞心愿???