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+//Example 22_8
+clc();
+clear;
+//To find the image positon and size
+d1=-20 //units in cm
+d2=40 //units in cm
+i=(d1*d2)/(d2-d1) //Units in cm
+printf("\nThe image is located at i=%.2f cm",i)
+d3=3 //units in cm
+I=(-i*d3)/d2 //units in cm
+printf("\nThe Size of the image is I=%d cm",I)