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Messages - Jianfeng Huang

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Chapter 2 / Re: Lecture 0201 question
« on: September 16, 2020, 11:20:50 AM »
I was also wondering how to extent the concept of direction field in this case, as both x and y are functions of t. Why the direction field shows the relationship between x and y? Is it because equations do not include t explicitly, and theoretically we can have 3-dimensional direction field? :)

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