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I was wondering if 18.4 will be tested on the final? I have tried some of the questions and they are hard. If they are on the final do you have any answers to the questions?

Thanks.

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18.4 is potentially in.

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Hi! It would be really helpful if there were solutions to section 18.4... would you be able to post these? If not could you just give me a hint on Q:2 What do I do once I have found expressions for C2n and C2n+1 in order to get an expression for Y and Y'??

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There is no need to separate even from odd indices here; there will be one constant at the end, C_{0}, since it is a differential equation involving the first derivative only. Do it carefully and if you are stuck then it wold help if you know exactly where you encounter a problem.

I do not have solutions of 18.4.