
#1
March 26th, 2020,
17:05
$ \displaystyle y''(x)+y'(x)+F(x)=0$
Pleas me a idea

March 26th, 2020 17:05
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#2
March 26th, 2020,
18:35
Originally Posted by
Another
$ \displaystyle y''(x)+y'(x)+F(x)=0$
Pleas me a idea
Let y'(x) = v(x). Then your equation becomes v'(x) + v(x) = F(x)
Now you have a first degree linear ordinary differential equation. You can't write down a final answer, but there is a method by which you can write it out in terms of F(x)...
Dan