|u₁₁ + εu₁ = c²uxx tt |u(0,t)=0, u(L,t)=0 u(x,0)=sin(x), u₁(x,0)=0 Use separation of variables to solve (IBVP-P5). cn Observe that the oscillation frequency is close to 2L (IBVP-P5) when & is small. ε

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