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diff --git a/1332/CH11/EX11.8/11_8.pdf b/1332/CH11/EX11.8/11_8.pdf
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diff --git a/1332/CH11/EX11.8/11_8.sce b/1332/CH11/EX11.8/11_8.sce
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+//Example 11.8

+//Recursive Formula

+//Page no. 357

+clc;close;clear;

+

+A=[2,-1,0,0;-1,2,-1,0;0,-1,2,-1;0,0,-1,2];

+l=poly(0,"l");

+p0=1;

+p1=A(1,1)-l;

+for i=2:4

+    p2=(A(i,i)-l)*p1-A(i,i-1)^2*p0;

+    p0=p1;

+    p1=p2;

+    printf('\n\np%i(l) = ',i);

+    disp(p2)

+end