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+clc;

+//page no 236

+//prob no. 7.7.1

+// refer to example 7.3.1

+// A broadcast receiver is tuned to a signal with

+fs=950;//in KHz

+IF=455;//in KHz

+m=[1,2];

+n=[1,2];

+f0=fs+IF;

+disp('The sum of frequencies are');

+for i=1:1:2

+    for j=1:1:2

+fu1=n(j)/m(i) *f0 + 1/m(i) *IF;

+disp(fu1);

+end

+end

+disp('The difference of frequencies are');

+for i=1:1:2

+    for j=1:1:2

+fu2=n(j)/m(i) *f0 - 1/m(i) *IF;

+disp(fu2);

+end

+end
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