Final answer:
Yes, an inversion bar can cover more than a single variable in a sum-of-products expression, as it denotes logical negation and can span a group of variables or an entire product term.
Step-by-step explanation:
The question asks whether an inversion bar in a sum-of-products (SOP) expression can cover more than a single variable in a term. The answer is yes. In Boolean algebra, the inversion bar, also known as a bar or overline, represents the NOT operation, and it can cover a single variable, a group of variables, or an entire product term to indicate logical negation.
For example, in the expression ¬(AB) + C, the inversion bar covers the entire product of variables A and B, indicating the logical negation of the product term AB. This shows that an inversion bar can indeed span more than one variable or element within an SOP expression.