The Demand Functions for Q_A and Q_B Units of Two

question 3

Multiple Choice

The demand functions for q_A and q_B units of two related products, A and B, are given. ​ ​
Where p_A and p_B are in dollars.
Find the marginal demand of q_A with respect to p_B and the marginal demand of q_B with respect to p_A. Are the two goods competitive or complementary?
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Definitions:

Health-Care Inflation

The rate at which medical services and healthcare costs increase over time, often surpassing the general inflation rate.

Health-Care Expenditures

The total amount of money spent on health care services, including prevention, treatment, and rehabilitation.

Third Party

An entity involved in a transaction or situation who is neither the buyer nor the seller, but may have an interest or role.

Consumer

An individual or group that purchases goods and services for personal use, driving demand in the economy.