[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:00.00,0:00:04.13,Default,,0000,0000,0000,,用计算器算3的自然对数ln3
Dialogue: 0,0:00:04.13,0:00:06.43,Default,,0000,0000,0000,,结果保留到百分位
Dialogue: 0,0:00:06.43,0:00:08.71,Default,,0000,0000,0000,,这里提示一下：3的自然对数ln3
Dialogue: 0,0:00:08.71,0:00:12.93,Default,,0000,0000,0000,,另一种表示方法是log以e为底3的对数
Dialogue: 0,0:00:12.93,0:00:17.51,Default,,0000,0000,0000,,或者说e的几次方等于3
Dialogue: 0,0:00:17.51,0:00:19.44,Default,,0000,0000,0000,,3比e稍大一点
Dialogue: 0,0:00:19.44,0:00:21.64,Default,,0000,0000,0000,,e为2.71…有无穷位
Dialogue: 0,0:00:21.64,0:00:24.66,Default,,0000,0000,0000,,所以3比e稍大一点
Dialogue: 0,0:00:24.66,0:00:26.94,Default,,0000,0000,0000,,可以预估结果是1.几几
Dialogue: 0,0:00:26.94,0:00:29.14,Default,,0000,0000,0000,,把计算器调出来算算看
Dialogue: 0,0:00:29.14,0:00:32.51,Default,,0000,0000,0000,,自然对数是这个“ln”键
Dialogue: 0,0:00:32.51,0:00:35.99,Default,,0000,0000,0000,,ln可能来自法语里的"log naturelle"
Dialogue: 0,0:00:35.99,0:00:37.78,Default,,0000,0000,0000,,或诸如此类的词
Dialogue: 0,0:00:37.78,0:00:40.36,Default,,0000,0000,0000,,那么3的自然对数是
Dialogue: 0,0:00:40.36,0:00:45.12,Default,,0000,0000,0000,,1.要求保留到百分位
Dialogue: 0,0:00:45.12,0:00:49.13,Default,,0000,0000,0000,,1.09后面的千分位是8
Dialogue: 0,0:00:49.13,0:00:53.50,Default,,0000,0000,0000,,大于等于5 所以应该进位
Dialogue: 0,0:00:53.50,0:00:57.56,Default,,0000,0000,0000,,9进一位后 等于10
Dialogue: 0,0:00:57.56,0:01:00.26,Default,,0000,0000,0000,,是1.10
Dialogue: 0,0:01:00.26,0:01:04.30,Default,,0000,0000,0000,,所以保留到百分位的话
Dialogue: 0,0:01:04.30,0:01:08.03,Default,,0000,0000,0000,,它约等于1.10