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## Homework Statement

y'' + 6y = 2cos3t

a)Determine frequency of the beats

b)Determine frequency of the rapid oscillations

c)Use the information from parts a) and b) to give a rough sketch of a typical solution

## Homework Equations

## The Attempt at a Solution

Not sure how to do the first 2 parts. I know the natural period is [tex]\frac{2 \pi}{B}[/tex] and natural frequency is [tex]\frac{B}{2 \pi}[/tex]