> 数学 >
lim(2-x)tanπ/4x
人气:358 ℃ 时间:2020-07-26 04:11:54
解答
应用罗比达法则
lim(2-x)tanπx/4
=lim(2-x)/cot(πx/4)
=lim(-1/[-πcsc^2(πx/4)/4])
=4limsin^2(πx/4)/π
=4/π
推荐
猜你喜欢
© 2026 79432.Com All Rights Reserved.
电脑版|手机版