lim x→1 sin(1-x)2/(x2-1)2等于多少
问题描述:
lim x→1 sin(1-x)2/(x2-1)2等于多少
答
lim x→1 sin(1-x)2/(x2-1)2
=lim x→1 (1-x)2/(x2-1)2
=lim x→1 1/(x+1)2
=1/4