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Mathematics 55 Online
OpenStudy (anonymous):

find the general solution.. y'' + 4y' = sin3x

OpenStudy (anonymous):

What method you want to prefer??

OpenStudy (anonymous):

What are you doing @mathslover ??

OpenStudy (anonymous):

is it applicable if we use modification?

OpenStudy (anonymous):

Modification??

mathslover (mathslover):

I was going to type something diff, u may carry on..

OpenStudy (anonymous):

modifraction. sorry.

OpenStudy (anonymous):

Well I don't know about this.. Do you know about method of undetermined coefficients??

OpenStudy (anonymous):

is that a differential equation ??

OpenStudy (anonymous):

Yes.. If you want to help then go ahead..

OpenStudy (anonymous):

@waterineyes yes. and it's a non-homo right? @reginald yes.

mathslover (mathslover):

K i am going to type my views on it wait

OpenStudy (anonymous):

i think that is a second linear ODE ..right ?

OpenStudy (anonymous):

Where is @unkleRhaukus He can help you in a better way..

mathslover (mathslover):

First find the general part of the solution by solving y" + 4y = 0 ----> y" = -4y

OpenStudy (anonymous):

@reginald yes. it is...

OpenStudy (anonymous):

ok wait..i'll try

OpenStudy (anonymous):

Yes it is non homogeneous but we can solve it by using that method..

mathslover (mathslover):

let me confirm about the answer : y = A*sin2x + B*cos2x - (1/5)*sin3x is this the answer ?

OpenStudy (lgbasallote):

i think that's just yp

OpenStudy (anonymous):

@reginald kk. thanks! :) @waterineyes can you show me how? XD @mathslover idk. that's why i'm asking here ( ̄□ ̄;)

mathslover (mathslover):

hmn k ... what r u getting the general part of the solution ?

mathslover (mathslover):

By solving this one :y" + 4y = 0 ----> y" = -4y ?

OpenStudy (anonymous):

yes. the general soln.. since there are no particulars.

OpenStudy (anonymous):

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