求极限,麻烦过程详细点,谢谢

2025-05-09 15:55:42
推荐回答(1个)
回答1:

0=lim-1/x²≤limcosx/x²≤lim1/x²=0
=lim(π/2)/∞=0
=lim(1-3/x²)/(1-2/x²)=(1-0)/(1-0)=1
=(3-0)/(4+0)=3/4