Math Is Fun Forum

EPhillips1989

Member

Registered: 2007-11-03

Posts: 29

particular integrals!!!

hey i have the differential equation
y''-5y'+6y=10cosx
im supposed to solve this, so far i have done:

solve y''-5y'+y=0 to get the CF trying y=e^(kx)
y'=ke^(kx)     y''=k^2e^(kx)
the auxillary equation is k^2-5k+6=0
Thus the CF is y=Ae^3x +Be^2x

Iv got to continue solving this equation does anyone know what i could set y to equal to find the PI (particular integral) please help!!!

JaneFairfax

Member

Registered: 2007-02-23

Posts: 6,868

Re: particular integrals!!!

Try

.

Last edited by JaneFairfax (2007-11-27 09:06:37)