### Author Topic: Problem of Section 2.6 Q28  (Read 330 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

• Jr. Member
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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

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.