That is true, but I cannot seem to understand how to continue ... a bigger tip maybe?
Also noticed that, the only difference is the coefficient. C*e^x is also one of the solutions to the given equation, how does this help?
Hi, everyone, I need some help with the following:
Homework Statement
Given is, that the following power series:
\sum_{n=0}^{\infty} \frac{x^{3n}}{(3n)!}
is the solution to the following differential equation: y''' - y = 0. Find the closed form of the series.
Homework Equations...