What is the marginal revenue formula from the demand function and how does it impact pricing strategies?

The marginal revenue formula from the demand function is the derivative of the total revenue function with respect to quantity. It is calculated by finding the change in total revenue when one additional unit is sold. Marginal revenue helps businesses determine the optimal level of production and pricing strategies by showing how changes in quantity sold affect revenue. It is used to maximize profits by setting prices based on the relationship between marginal revenue and marginal cost.