APM346--2020S > Chapter 4
4.1 typos
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Yan Zhou:
The solutions to equation (11) should be $k_{1,2} = \pm \frac{\pi n}{l}i$. There is a missing sign of $\pm$.
In the second term of equation (13), $B_{n}sin(\frac{c\pi nt}{l})$ has an extra letter A.
Victor Ivrii:
You seem to have a different texbook than posted
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