Toronto Math Forum
APM346--2020S => APM346--Lectures and Home Assignments => Chapter 4 => Topic started by: Yan Zhou on March 04, 2020, 02:45:36 PM
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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.
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You seem to have a different texbook than posted