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diff --git a/3860/CH3/EX3.22/Ex3_22.txt b/3860/CH3/EX3.22/Ex3_22.txt
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+++ b/3860/CH3/EX3.22/Ex3_22.txt
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+ 
+ f(a,b,c,d) = summation of minterms(0,1,4,5,10,11,14)
+
+ The function f'(a,b,c,d) = summation of minterms(2,3,6,7,8,9,12,13,15)
+
+        a'b' a'b  ab   ab' 
+
+ c'd'    1    1    
+
+ cd'     1    1 
+
+ cd                    1
+
+ cd'              1    1
+
+ The three solutions are given below
+
+  g1 = c'd' + ab + b'd' + a'cd
+
+  g2 = c'd' + ab + b'd' + a'b'c
+
+  g3 = c'd' + ab + a'd' + a'b'c
+\ No newline at end of file