### Author Topic: Problem of Section 2.6 Q28  (Read 1847 times)

#### Shujun Fan

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##### 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.

#### Shujun Fan

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##### Re: Problem of Section 2.6 Q28
« Reply #1 on: October 01, 2020, 04:47:48 PM »
Sorry, here is the first image

#### Shujun Fan

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

#### Yuanting Wu

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##### Re: Problem of Section 2.6 Q28
« Reply #3 on: October 02, 2020, 03:50:03 AM »
In the textbook, it is e^(-2y). Maybe this one is correct.

#### Victor Ivrii

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##### Re: Problem of Section 2.6 Q28
« Reply #4 on: October 03, 2020, 07:54:48 AM »
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).
If you found an integrating factor correctly there should be no problem to $h(y)$. There is a problem with your solution, not with the problem.
In the textbook, it is e^(-2y). Maybe this one is correct.
Both are correct
« Last Edit: October 03, 2020, 08:00:52 AM by Victor Ivrii »