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diff --git a/758/CH6/EX6.20/Ex_6_20.sce b/758/CH6/EX6.20/Ex_6_20.sce
new file mode 100755
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+++ b/758/CH6/EX6.20/Ex_6_20.sce
@@ -0,0 +1,8 @@
+//Example 6.20
+
+clc;clear;
+n=0:7;
+x=2^n;
+X=clean(fft(x));
+disp(x,'x(n)=');
+disp(X,'X(k)=');
+\ No newline at end of file