lim(x,y)→(0,1) (1+xy)^1/x 求大神帮忙,谢谢~
问题描述:
lim(x,y)→(0,1) (1+xy)^1/x 求大神帮忙,谢谢~
答
原式= lim(x,y)→(0,1) (1+xy)^[1/yx·y]
=[lim(x,y)→(0,1) (1+xy)^1/yx]^[lim(x,y)->(0,1)y]
=e^1
=e