**Unformatted text preview: **assume that F ( x ) = sin kx , where k is some constant. Find the equation for G , and solve it. For this problem u (0 , t ) = 0 already. How could we also get u ( L, t ) = 0? Notice that the function G is unaﬀected. 4. Strauss 3.2 #9 -wave equation on a ﬁnite interval 5. Strauss 3.3 #2 - postponed to PS 5 Version 1.1...

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