# What exactly do they want?

## Homework Statement

Set up but do not solve for the appropriate particular solution yp for the differential equation

y''+25y=–1xcos(5x)

using the Method of Undetermined Coefficients (primes indicate derivatives with respect to x).

## Homework Equations

Possible Derivatives
• sin(x)
• cos(x)
• xsin(x)
• xcos(x)

## The Attempt at a Solution

This seems like the solution should simply be

$$A*x*sin(5*x)+B*x*cos(5*x)+C*cos(5*x)+D*sin(5*x)$$

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