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+//chapter 7
+//Example 7.9
+//Page 190
+//impedacedetermination
+clear;clc;
+//Given Impedances
+Z10 = %i*1.2;
+Z21 = %i*0.2;
+Z23 = %i*0.15;
+Z13 = %i*0.3;
+Z30 = %i*1.5;
+//Solution
+Z_eq = (Z13 * (Z21+Z23) / (Z13+Z21+Z23));
+Z11 = Z10 * (Z30 + Z_eq) / (Z10 + Z30 + Z_eq);
+disp('Z11 is given by')
+disp(Z11)
+\ No newline at end of file