What is the Boolean expression for an OR operation with three inputs?

The Boolean expression for an OR operation with three inputs is represented by the addition symbol, which is denoted as "+." In this case, when you have three inputs A, B, and C, the expression F = A + B + C means that the output F will be true if at least one of the inputs A, B, or C is true (i.e., has a value of 1).

This aligns perfectly with the definition of the logical OR operation, where the result is true if one or more conditions are met. Thus, for three inputs, you simply combine them using the OR operator, which is expressed as the mathematical addition in Boolean algebra.

In contrast, other options utilize multiplication or a combination of multiplication and addition, which do not represent the OR operation but rather AND operations or mixed operations. These do not provide the accurate representation of an OR operation where any one input being true results in a true output.