### Author Topic: Web bonus problem--Week 3  (Read 10155 times)

#### Victor Ivrii

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##### Web bonus problem--Week 3
« on: January 20, 2018, 09:49:36 AM »
a. Find the general solution of
$$y'+2\cot(t)y=\cos(t).$$
b. Find solution, which is defined on $(-\infty,\infty)$;
c. Find solution, which is defined on $(-\infty,\infty)$ and periodic.

#### Wenzhe Xu

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##### Re: Web bonus problem--Week 3
« Reply #1 on: January 22, 2018, 01:42:07 PM »
Here is my attempt, but I'm confusing about question b and c, is my thought right?

« Last Edit: January 22, 2018, 01:53:43 PM by WenzheXu »

#### Runcong Wu

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##### Re: Web bonus problem--Week 3
« Reply #2 on: January 22, 2018, 01:47:54 PM »
Here, the last one has the wrong image code
« Last Edit: January 22, 2018, 01:51:43 PM by Runcong Wu »

#### Victor Ivrii

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##### Re: Web bonus problem--Week 3
« Reply #3 on: January 22, 2018, 01:53:50 PM »
Looks OK. Could you type it?

#### David Chan

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##### Re: Web bonus problem--Week 3
« Reply #4 on: January 22, 2018, 02:59:02 PM »
My (typed) solution:
« Last Edit: January 22, 2018, 04:09:22 PM by David Chan »

#### Rui Zhu

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##### Re: Web bonus problem--Week 3
« Reply #5 on: January 22, 2018, 07:33:07 PM »
Hi, here is my solution
« Last Edit: January 22, 2018, 07:55:47 PM by RuiZhu »

#### Junya Zhang

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##### Re: Web bonus problem--Week 3
« Reply #6 on: January 22, 2018, 08:18:11 PM »

« Last Edit: January 22, 2018, 08:26:55 PM by Junya Zhang »

#### Yuying Zhai

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##### Re: Web bonus problem--Week 3
« Reply #7 on: January 22, 2018, 08:33:30 PM »
Hello, here is my solution.

#### Kaiman Chen

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##### Re: Web bonus problem--Week 3
« Reply #8 on: January 22, 2018, 08:45:01 PM »
Here is my final answer for week 3 bonus problem

#### Xiangji Kong

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##### Re: Web bonus problem--Week 3
« Reply #9 on: January 22, 2018, 09:09:23 PM »
MAT334

#### Seunghyun Park

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##### Re: Web bonus problem--Week 3
« Reply #10 on: January 22, 2018, 09:13:53 PM »

#### Xu Bai

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##### Re: Web bonus problem--Week 3
« Reply #11 on: January 22, 2018, 09:13:58 PM »

my solution to week3's problem

#### Zhiqing Pan

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##### Re: Web bonus problem--Week 3
« Reply #12 on: January 22, 2018, 09:25:02 PM »
« Last Edit: January 22, 2018, 10:34:20 PM by Zena »

#### Yufei Cai

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##### Re: Web bonus problem--Week 3
« Reply #13 on: January 22, 2018, 09:31:11 PM »
Here is my solution.
« Last Edit: January 22, 2018, 09:59:13 PM by Yufei Cai »

#### Vivian Ngo

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##### Re: Web bonus problem--Week 3
« Reply #14 on: January 22, 2018, 09:47:55 PM »