limx→1(x平方-1)⼀sin(x-1)求解

2025-06-24 21:21:49
推荐回答(1个)
回答1:

sin(x-1) ~ x-1代人就得到
(x^2-1)/sin(x-1) ~ (x^2-1)/(x-1) = x+1 =2