2 files changed, 19 insertions, 0 deletions
diff --git a/1332/CH20/EX20.1/20_1.pdf b/1332/CH20/EX20.1/20_1.pdf
new file mode 100755
index 000000000..e9c8204f9
--- /dev/null
+++ b/1332/CH20/EX20.1/20_1.pdf
diff --git a/1332/CH20/EX20.1/20_1.sce b/1332/CH20/EX20.1/20_1.sce
new file mode 100755
index 000000000..ba5d7e975
--- /dev/null
+++ b/1332/CH20/EX20.1/20_1.sce
@@ -0,0 +1,19 @@
+//Example 20.1
+//Direct Method
+//Page no. 682
+clc;clear;close;
+h=1/3;
+A=[-4,1,1,0;1,-4,0,1;1,0,-4,1;0,1,1,-4]
+x=0;
+for i=1:4
+    x=x+h
+    if i==4 then
+        B(i,1)=0
+    else
+        B(i,1)=-1*sin(x*%pi)^2
+    end
+end
+disp(A,'A =')
+disp(B,'B =')
+U=inv(A)*B
+disp(U,'U =')
+\ No newline at end of file