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/sci/ - Science & Math

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4743017 No.4743017 [Reply] [Original]

Can I get some help on this problem? I'm having a ton of issues with reducible equations in DFQ...

ydx+(1+ye^x)dy=0

Here's what I tried:
u=y
du/dx=dy/dx
y+(1+ye^x)dy/dx=-
u+(1+ue^x)du/dx=0
Nope.avi

Correct answer is ylny+cy=e^-x


just solve it by using an appropriate substitution.
>FYI, this isn't homework, I'm just trying to study.

>> No.4743022

This is at least the 3rd diff eq thread you made today. Get your shit together and keep the homework spam to one thread. Or drop the course, if it's too hard for you.

>> No.4743042

>>4743022
I only made 1 other one dude... and that was a general calculus question, not DFQ.

>> No.4743505

Try the substitution u = 1 + ye^x. I used that and got the answer you gave after some simple algebra and integration.