Comment on the statement: The general solution of is . I am not sure what this question wants me to comment about unless it is the fact it should be written like
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When will the solution be a sum of exponential functions? When will the solution need to have an extra factor of ? When will your solution need to use sines and cosines?
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![\varphi=e^{-3}\left[A\cos(x\sqrt{\lambda-9})+B\sin(x\sqrt{\lambda-9})\right]](http://latex.codecogs.com/png.latex?\varphi=e^{-3}\left[A\cos(x\sqrt{\lambda-9})+B\sin(x\sqrt{\lambda-9})\right])
