Q4. Solve - Zxx = e sin 3x with boundary conditions z(0,t) = z(π,t) = 0 and initial condition z(x, 0) Answer = x sin x. (e-t-e-⁹t) sin 3x е 16 ㅠ ∞ m= m (4m² − 1)² ' sin 2mxe-4m²t

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