数学中,下面一题划线的左边式子是怎么变成右边那样的?

2025-05-18 03:24:09
推荐回答(2个)
回答1:

约分,
约去公因式x后,
左边=2·lim(x→0)e^(-x)
=2·e^0
=2·1
=2

回答2:

interest the I.R.S