# Second order differential equations

fan_boy17

## Homework Statement

finding the general solution. I would like to know if the 20-e^x will be treated as a sum of a polynomial?

## The Attempt at a Solution

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Mentor

## Homework Statement

finding the general solution. I would like to know if the 20-e^x will be treated as a sum of a polynomial?

## The Attempt at a Solution

20 - ex is not a polynomial. A search on wikipedia will turn up the definition of a polynomial.

Homework Helper
It is, of course, the sum of two functions. Did you really mean to say "polynomial"?

You should look for a "particular solution" of the form A+ Bex.

Homework Helper
Gold Member
It is, of course, the sum of two functions. Did you really mean to say "polynomial"?

You should look for a "particular solution" of the form A+ Bex.

That's a typo, Halls meant ##A+Be^{2x}##.

fan_boy17
can anyone help with solving it :(