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each row of inputs, we will calculate Y and Z, respectively. Then we would
               add Y and Z, to get X.




















               Example 16.12   For the logic circuit shown in Fig. 16.10, write the Boolean
               expression and construct the truth table.
















                                                         Figure 16.10:


               Solution:


               The Boolean expression is developed from Fig. 16.11 as
















                                                         Figure 16.11:


               The Boolean expression is
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