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diff --git a/845/CH7/EX7.1/Ex7_1.sce b/845/CH7/EX7.1/Ex7_1.sce
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+++ b/845/CH7/EX7.1/Ex7_1.sce
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+//Example 7.1
+
+clc
+clear
+
+x = 0:0.2:1;
+y = [1 1.16 3.56 13.96 41.96 101];
+
+n = length(x);
+del = %nan*ones(n,6);
+del(:,1) = y';
+for j = 2:6
+    for i = 1:n-j+1
+        del(i,j) = del(i+1,j-1) - del(i,j-1);
+    end
+end
+del = round(del*10^2)/10^2;
+mprintf("%5s %6s %9s %8s %8s %8s %7s",'x','y','dy','d2y','d3y','d4y','d5y')
+disp([x' del])
+
+h = x(2) - x(1);
+del0 = del(1,:);
+del1 = del(2,:);
+
+df1 = (del1(2) - del1(3)/2 + del1(4)/3 - del1(5)/4) / h;
+d2f0 = (del0(2) - del0(3) + del0(4)*11/12 - del0(5)*5/6) / h^2;
+disp(round(d2f0*10^1)/10^1,"f''''(0) = ")
+disp(round(df1*10)/10,"f''(0.2) = ")
+