The video owner has disabled playback on external websites.
This video is no longer available on YouTube.
This video cannot be played right now.
Watch on YouTube
学习统计
CEFR 等级
难度
字幕 (103 片段)
ROGER BOWLEY: I'm going to be talking about logarithms,
logarithms to the base 10.
So for example, if I have a number, which is 100, I can
think of that as 10 squared, or 10 to the power 2.
So 2 is the logarithm of this number, 100, to the base 10.
1,000 is 10 to the 3.
This is the logarithm, the 3, and it corresponds to the
number of 0's there.
It is logarithm of 1,000 equals 3.
I can do 10 to another number.
So for example, 10 to the 1.6232 turns out to be 42.
That means that if I were to take 10, that means that the
log to the base 10 of 42 is 1.6232 to
four significant figures.
The reason it's useful is multiplication.
If I have two numbers and I want to multiply them
together, it's easy to make mistakes, because there are a
lot of little operations that have to be added up.
If you go through logarithms and you get a logarithm of a
number, such as 42, and you multiply it with another
number, such as 37, or 59, or 200, you get the logarithm of
完整字幕可在视频播放器中查看
评论 (0)
登录后评论互动模式
测验
正确答案：
相关视频
ENGLISH SPEECH | AMITABH BACHCHAN: Power of Dreams (English Subtitles)
Making Of "Meet The Super Kids" Scene | We Can Be Heroes | Netflix
The history of chocolate - Deanna Pucciarelli
Fashion Talk On The Street | The Late Show 30th Anniversary
Tim Minchin does Bake Off like no one else | The Great Stand Up To Cancer Bake Off
Numberphile
测验
正确答案：
观看视频时会出现测验
记忆技巧
来自此视频
免费开始学语言
