To construct a 3-input XOR gate using 2-input XOR gates, you can connect the inputs in the following way: First, take two of the three inputs (let's call them A and B) and connect them to a 2-input XOR gate, producing an output (let's call it X). Then, connect the output X and the third input (C) to another 2-input XOR gate. The output of this second XOR gate will be the result of the 3-input XOR operation, effectively computing ( A \oplus B \oplus C ).
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