Question: For the grid in Fig. 456 compute the potential at the four internal points by Gauss and by 5 GaussSeidel steps with starting values 100,

For the grid in Fig. 456 compute the potential at the four internal points by Gauss and by 5 Gauss€“Seidel steps with starting values 100, 100, 100, 100 (showing the details of your work) if the boundary values on the edges are:

u = 0 on the left, x³ on the lower edge, 27 - 9y² on the right, x³ - 27x on the upper edge.

3 P22 P12 2 P. P11 21 2 3.

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