- #1
schattenjaeger
- 178
- 0
y''+16y=24cos(4x)
it was mentioned in class that our book's answer was wrong on some problem, but I forgot which one and now that's biting me in the butt(I really should've written it down)
For the particular solution I got y=3x*sin(4x), which if I plug it in works. The book's solution: (this is the general solution, so the first part is the complementary solution which is right)
y=c1cos(4x)+c2sin(4x)+1/17*x(24*cos(4x)+96*sin(4x))
it was mentioned in class that our book's answer was wrong on some problem, but I forgot which one and now that's biting me in the butt(I really should've written it down)
For the particular solution I got y=3x*sin(4x), which if I plug it in works. The book's solution: (this is the general solution, so the first part is the complementary solution which is right)
y=c1cos(4x)+c2sin(4x)+1/17*x(24*cos(4x)+96*sin(4x))