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Messages - Shujun Fan

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Final Assessment--Part I / The general format of the final
« on: December 13, 2020, 02:29:36 PM »
Hello, I just wanna make sure, will the format of the exam the same as our prof posted, exactly same types of questions?

Thanks in advance

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Chapter 2 / Re: Problem of Section 2.6 Q28
« on: October 01, 2020, 04:49:41 PM »
Here is the second image

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Chapter 2 / Re: Problem of Section 2.6 Q28
« on: October 01, 2020, 04:47:48 PM »
Sorry, here is the first image

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Chapter 2 / Problem of Section 2.6 Q28
« on: October 01, 2020, 04:45:10 PM »
Hi there, I think there might be some problem with Q28. After I found the integrating factor and then solve for the solution, it's impossible to find the solution of my h(y) in this case (see the last line of my writing).

/Users/loreinafan/Desktop/IMG_0574.jpg

So in this case, I think there might be some problem with the factor that I circled in white.

/Users/loreinafan/Desktop/IMG_3049.JPG

Any help would be appreciated.

5
Chapter 2 / Re: LEC 0201 question (W2L2)
« on: September 19, 2020, 04:23:48 PM »
Yeah, I didn't do the partial fraction decomposition correctly, but the step after that is correct.
I still got the same answer again and again, but not the given one in the lecture slides:(

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Chapter 2 / LEC 0201 question (W2L2)
« on: September 18, 2020, 10:42:46 PM »
For another question, I've calculated this problem by using another method, which I think it makes sense,
but when I compared it to the slides, this is completely wrong, can somebody help me with it?

Any help would be appreciated.

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Chapter 2 / Re: W2L2 question
« on: September 18, 2020, 09:24:31 PM »
Ok, never mind, I figured out the question. That was my problem:)

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Chapter 2 / W2L2 question
« on: September 18, 2020, 09:20:16 PM »
Hi, I have a question about this one, the file attached.
In the red circle, I think the answer should be the antiderivative of cos(t) in stead of 1, is this a typo?

Any help would be appreciated:)

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