lim x→0.25派 (tanx)∧tan2x 求极限

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/18 08:23:37
lim x→0.25派 (tanx)∧tan2x 求极限
xSn@|+&^!q8[DyvlHSq*B#@JA$ PHĔG"b'v聜v>|3Or-6כ1}>ϟkxڊ*5@n2":c2æat1St#S&#xkv-\FZ_2,h2}vP5+.4[ZJ0Nּv#-3 w6Anve6=@:mp,k*kU]A5}C`(JfE![baMV%Tȁ**.!A5Bt(" Y! V* h{.ºyP7G,GUm6A6bz.vُ`>0s0!ypvrxX?uvu|T00:Y~Gg<

lim x→0.25派 (tanx)∧tan2x 求极限
lim x→0.25派 (tanx)∧tan2x 求极限

lim x→0.25派 (tanx)∧tan2x 求极限
(x→π/4)lim(tanx)^tan2x=(x→π/4)lim(1+tanx-1)^tan2x
由公式,当f(x)→0,g(x)→∞时 lim [1+f(x)]^g(x)=e^lim(g(x)*ln[1+f(x)]) =e^lim[g(x)*f(x)] 
所以原式=e^(x→π/4)lim[tan2x(tanx-1)]=e^(x→π/4)lim[(2tanx/(1-tan&#178;x))*(tanx-1)]
=e^(x→π/4)lim[(-2tanx/(1+tanx)]
=e^(-1)
 
 
 

还有问题吗?有的话继续提,没有的话请采纳,