I missed class last Thursday and I am completely confused about the homework. I tried reading the text but there aren't any example problems like this one. Anyone know any free resources for James Stewart Single Variable Calculus?(adsbygoogle = window.adsbygoogle || []).push({});

Well here is the question:

For what values of k does the function y=cos kt satisfy the differential equation 4y"=-25y.

For those values of k, verify that every member of the family of functions y=A sin kt + B cos Kt.

I tried solving for y" and setting the equations equal to eachother. To tell the truth I don't understand what the question is saying.

Thanks for any help!

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# Homework Help: Differential Equations.

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