Question: (20 points) Solve the heat conduction problem for the temperature u(r, t) in a uni- form rod of length 3, with the temperature held constant

(20 points) Solve the heat conduction problem for the temperature u(r, t) in a uni- form rod of length 3, with the temperature held constant at a value of 0 at one end and at a value of 21 at the other end, 00, u(0, t) = 0, u(3, t) = 21, t>0, u(x, 0) = 0, 0

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