求极限公式,lim x趋于无穷,sinx/x x/sin1/x lim x趋于0,xsin1/x 1/xsinx xsin1/x
问题描述：
求极限公式,lim x趋于无穷,sinx/x x/sin1/x lim x趋于0,xsin1/x 1/xsinx xsin1/x
答
lim x趋于无穷 sinx/x=0
lim x趋于无穷 x/sin1/x->无穷/0型还是无穷
lim x趋于无穷 xsin1/x=(sin1/x)/(1/x)=1
lim x趋于0 xsin1/x=0
lim x趋于0 1/xsinx=1