英文字典中文字典51ZiDian.com

中文字典辞典英文字典 a b c d e f g h i j k l m n o p q r s t u v w x y z

安装中文字典英文字典辞典工具!

安装中文字典英文字典辞典工具!

Why is $22 7$ a better approximation for $\\pi$ than $3. 14$?
Here is a proof that $\displaystyle \frac{22}{7}$ is a better approximation than $\displaystyle 3 14$ First we consider the amazing and well known integral formula for $\displaystyle \frac{22}{7} -\pi$ (for instance see this page: Proof that 22 7 exceeds pi )