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diff --git a/2534/CH13/EX13.4/Ex13_4.sce b/2534/CH13/EX13.4/Ex13_4.sce
new file mode 100755
index 000000000..c12910cc7
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+++ b/2534/CH13/EX13.4/Ex13_4.sce
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+//Ex13_4
+clc
+C1 = 1*10^-9//capacitance of capacitor 1
+C2 = 10*10^-9//capacitance of capacitor 2
+L = 110*10^-6//inductance of inductor
+beta = C1/C2//feedback factor
+f0 = ((C1+C2)/(C1*C2*L))^.5/(2*%pi)//operating frequency
+disp("C1 = "+string(C1)+"F")
+disp("C2 = "+string(C2)+"F")
+disp("L = "+string(L)+"H")
+disp("beta = "+string(beta))
+disp("f0 = ((C1+C2)/(C1*C2*L))^.5/(2*pi) = "+string(f0)+"Hz")
+
+//note : unit given for inductance "L" is wrong in the textook for the above question.