Lesson Comments
Well, actually f'(x**2) is a composite derivative: f'(g(x)) where g(x) = x**2. The derivative of f(g(x)) = f'(g(x))g'(x). This is called the chain rul... Read more
I found this book interesting: http://www.amazon.com/China-Modern-History-Michael-Dillon/dp/1850435820 The cover looks different to the book I r... Read more
Is there a way to make it show traditional characters when you click on the "text version" link? PS: Way to make a controversial lesson (: Read more
In the grammar section of this lesson, the fourth sentence has an error. While the 'simplified' version is correct, the 'traditional' character presen... Read more
Could just be my limited listening skills, however in Taiwan I have never heard 分 used in the context of referring to a month. Read more
Conversation is painfully slow, however useful words to learn in there! Read more
"Now, f'(3) really doesn't make much sense" yes I agree - by itself it doesnt. Thats what started the whole thing. I dont disagree with anything yo... Read more