求lim(x->1)[(3x-3)tan((π/2)x]

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/28 05:40:12
求lim(x->1)[(3x-3)tan((π/2)x]

求lim(x->1)[(3x-3)tan((π/2)x]
求lim(x->1)[(3x-3)tan((π/2)x]

求lim(x->1)[(3x-3)tan((π/2)x]
lim(x->1)[(3x-3)tan((π/2)x]
=lim(x->1)[(3x-3)/cot((π/2)x]
分子分母求导数
3/[-1/sin²((π/2)x)* (π/2)]
=-3/[(π/2)/sin²((π/2)x]
=-3/(π/2)
=-6/π