[ECON 337] - Final Exam Guide - Ultimate 36 pages long Study Guide!

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purpletiger335

29 Nov 2016

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For any entry the minor is the 2-by-2 determinant formed by deleting the row and column of the entry in question. 5 the minor for the entry 2 is. 47 and the minor for the entry 1 is. The matrix of cofactors is found by changing every second sign in the matrix of minors. For the example, the matrix of cofactors is. The adjoint is the matrix of cofactors transposed. When the original matrix is multiplied by the adjoint, the result will look like. If the determinant is zero, the original matrix is said to be non- invertible, or singular. If the determinant is not zero, then the inverse of the original matrix is. Remember that for symmetric matrices you get a lot of free ones. Find the inverses and determinants of the following matrices: Use the inverses of 1d) and 1e) to solve the following systems:

Related Questions

Emma decided to study an extra hour an extra hour for her Economics exxam instead of completing the final edit for her English Lit paper. Assume that Emma's best opition is to study for her exam and her next best opition is to edit her paper. The opportunity cost of this decision is best measured as the amoung by which Emma's grade may:

a. rise on her English Lit paper

b. rise on her Economics exam

c, fall on her English Lit paper

D, fall on her Economics exam

Homework help and study guide help, all multiple choice

A monopolist:

A) can sell as much as it wants at the chosen price because it is the only seller.

B) can increase the price only if it is willing to decrease the quantity sold.

C) can increase the price and the quantity sold at the same time.

D) is not restricted by the law of demand.

A monopolistically competitive firm:

A) produces where marginal revenue equals marginal cost and charges the price consumers are willing to pay as given by the demand curve.

B) produces where marginal cost equals average total cost and charges the price consumers are willing to pay as given by the demand curve.

C) chooses price and quantity based on where the marginal cost curve meets the demand curve.

D) chooses price and quantity based on where the average total cost curve meets the demand curve.

21) Oligopoly is A) like a monopoly because there are barriers to entry. B) like perfect competition because oligopoly firms all sell homogeneous goods. C) like monopolistic competition because oligopoly firms all sell differentiated goods D) like perfect competition because there are many firms in the industry
ECON 1102 (Microeconomics) Test 4 (043015)

In ________ market structure, a firm's output depends ________.

A) an oligopoly; only on its own marginal revenue and marginal cost curves

B) a monopolistically competitive; in part on its competitors' price and quantity decisions

C) an oligopoly; in part on its competitors' price and quantity decisions

D) a monopolistically competitive; only on its marginal revenue curve

Essay questions are due at the end of the course. It is strongly recommended that you accumulate your answers as you complete each unit and don't leave them all until the last minute. Please type your responses to the following short answer/discussion questions and short problems. Although your answers need not be lengthy (generally, 1-2 short paragraphs is fine), you should be careful to respond to all parts of the question asked. It is very important that your answers demonstrate that you have made the effort to read the chapter that relates to the question and thoroughly studied the relevant topic. Answers should be submitted in complete sentence and paragraph form, and writing presentation is important. Please remember that late essay questions are NOT accepted. 1. How is a "market" defined? Distinguish between an industry and a market. (1 point) 2. Suppose a market becomes more competitive over time. What happens to the elasticity of demand for a particular firm's good as its market becomes more competitive? (1 point) 3. Why are the monopolist's and the monopolistically competitive firm's demand curves downward sloping while the competitive firm's demand curve is horizontal? (1 point) 4. Why is a perfectly competitive firm's long-run supply curve the same as its marginal cost curve above the average total cost curve? (1 point) 5. Explain why monopolists do not achieve efficiency. (1 point) 6. Another student advocates the forced break-up of large firms, such as Microsoft and AT&T, on the grounds that they have a lot of monopoly power, which they use to charge inefficiently high prices. According to Schumpeter, would breaking apart these gigantic firms guarantee consumers lower prices? Explain. (1 point) 7. Explain why firms should not shut down in the short run until price falls below average variable cost. (2 points) 8. Suppose your economics professor publicly states that she grades on a curve (i.e., the top 10% of the students get an A, the next 20% get a B, the next 40% get a C, the next 20% get a D, and the lowest 10% fail). The whole class could save itself a lot of work by agreeing privately not to study at all for the final exam and just letting the rankings thus far determine the final grades. Why might such an agreement be difficult to maintain and enforce? Which market structure, if any, is this situation most analogous to? (1 point) 9. Why do firms practice price discrimination? Is efficiency affected by price discrimination? If so, how? (1 point)

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[ECON 337] - Final Exam Guide - Ultimate 36 pages long Study Guide!

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