for the function f(X)=3√x(x-7)² which of the following statements are true ? 答案: f (7) = 0 is a relative minimum 【題目】Let A = J e1(1nx)2 dx ， then 答案: 0 < A < 1 Let a=∫1 0 x5(1-x3)1/3 dx，then 答：0<A<1 Let A be the area between the curves y = sin x and y = sin 2x from x = 0 to x = π 。then 答案: 2 < A < 3 For implicit function 2xy+ex+y -2=0 dy/dx (0,ln2)=? 答案: -1 - ln2 Suppose the demand and supply functions for a certain goods are given by: QD=10-P QS=P-4 Find the total economic surplus generated at the market equilibrium 答案: 9.0 Converting from type ____ to type ____ will result in the loss of data. 答案: int, char Suppose A, B and C are three points on a linear demand as in the figure below. The comparison of price elasticities is 答案: A>B>C Which of the following statements is true? Oligopolists : 答案: all of the above. The expansion of capital that can occur in the long-run but not in the short-run, means that the long-run supply is 答案: more elastic than the short-run supply curve. A competitive firm will tend to expand its output so long as: 答案:  Marginal revenues is greater than marginal cost. If resources are used efficiently, then _____. 答案: consumer surplus plus producer surplus is maximized    If the quantity demanded increase as peoples incomes increase, the result of 【解答】  a normal good. A multitasking operating system developed in the early 1970s at Bell Laboratories: 答案: UNIX  When marginal profit equals zero. 答案: profit is maximized. The prisoners’ dilemma is a simple game in which： 答案: both parties are made worse off by following their own self-interests. Suppose the price of a good rises. When will the resulting substitution effect reduce the quantity demanded of the good? 答案: Always Suppose that the price of eggs increases from 75 cents to $1.00 per dozen and as a result a typical farmer experiences a decrease in egg sales from 300 to 200 dozen per week. Using the method of average values, the price elasticity of demand is 答案： 1.4 If a good is produced using inputs for which there are no substitutes, the good's  答案: elasticity of supply is likely to be small.  Which of the following would be most likely to cause the demand for cheese to shift from D0 to D1? 答案: an increase in income, assuming cheese is a normal good Assume that we have a demand curve of the form.log(Q)=a-b×log(P)+c×log(I), where Q=quantity, P=price, I=income, and a, b, and c are positive constants. The income and price elasticities for the demand curve represented above are always 答案: constant A profit-maximizing firm in a competitive market is able to sell its product for $7. At its current level of output, the firm’s average total cost is $10. The firm’s marginal cost curve crosses its marginal revenue curve at an output level of 9 units. The firm experiences a 答案: loss of exactly $27. The owner of a local hot dog stand has estimated that if he lowers the price of hot dogs from $2.00 to $1.50, he will increase sales from 400 to 500 hot dogs per day. Using the midpoint formula, the demand for hot dogs is 答案: inelastic A short piece of information used to authenticate a message is commonly referred to as 答案: MAC Which of the following system is used to manage information about customers, interact with customers, and to improve a company's relationship with its customers? 答案: CRM If cigarettes and marijuana had been found to be substitutes, a tax placed on cigarettes would 答案: increase the demand for marijuana  (In C) int x=1; if (x=2) x=3; the value of x is ____. 答案: 3 If price exceeds average costs under pure competition, in the long run ,______ firms will enter the industry, supply will ______, and price will be driven ______. 答案:more; increase; down Levi’s jeans sell for $100 a pair. Suppose at the profit maximizing quantity, Levi’s average total cost was $110 and Average variable cost was $55, which statement is true? 答案: Levi’s will produce in the short run but go out of business in the long run The kinked demand curve model was developed to help explain. 答案: rigidities in prices in oligopolistic industries. Suppose the price elasticity of demand for oil is 0.1. price elasticity of supply for oil is 0. In order to lower the price of oil by 20 percent, the quantity of oil supplied must be increased by 答案:2 percent. Raisin bran and milk are complementary goods. A decrease in the price of raisins will 答案:increase consumer surplus in the market for raisin bran and increase producer surplus in the market for milk. A freeze that destroys half of the water lily crop in Tainan would likely raise the price of water lily. 答案: reducing the quantity demanded for water lily and increasing the demand for tea Economic scarcity arises from 答案:   limited resources and limitless wants. What kind of virus is typically hidden in MS word file? 答案: macro In long-run equilibrium of a competitive market, the number of firms in the markets adjusts so that all of the market demand is satisfied at a price equal to 答案: minimum average total cost

Suppose the demand for gourmet coffee can be represented by a linear demand curve. When income rises cause the demand curve for gourmet coffee shift to the right parallelly:

答案: becomes less elastic at the price that prevailed before the change in income

The kinked demand curve model assumes that a firm's rivals will

答案: follow the firm's price decreases but not its price increases

Which of the following acronyms refers to ports on laptop computer that accept small cards that server as expansion boards?

答案: PCMCIA

 The fallacy of composition is evident in which of the following statements?

答案: If each farmer works harder all farmers will be richer.

If the price of the Walkman is below the equilibrium price, there will be a _______ of Walkmans and the price will _______.

答案: shortage; rise

The price elasticity of demand for cigarettes is 0.4. If government wants to reduce smoking by 10 percent, by how much should it raise the price of cigarettes by imposing a tax?

答案: by 25 percent

Under which of the following conditions would the interdiction of illegal drugs result in a decrease in the quantity of drugs sold and in a decrease in total spending on illegal drugs by drug users?

答案: The price elasticity of demand for illegal drugs is 1.3

Nick can purchase each milkshake for $2. For the first milkshake purchased Nick is willing to pay $4, for the second milkshake $3, for the third milkshake $2 and for the fourth milkshake $1. What is the value of Nick's consumer surplus?

答案: 3

CDC character set contains 64 characters, To represent any possible 10 character string needs at least

答案: 60

When demand increases and supply decreases, the

答案: equilibrium price rises, and the equilibrium quantity might increase, decrease, or remain constant.

In the short run the magnitude of the own price elasticity of demand for ice cream:

答案: is lower than in the long run.

「微管仲，吾其被髮左衽矣。」的「微」字字義與下列何者相同？

答案: 「微」夫人之力，不及此

The supply curve for a good or service shows the sellers’

答案: minimum acceptable price.

Which of the following is the amount a person would invest now to receive a greater amount in the future?

答案: Present value

(甲)子夏問曰：「『巧笑倩兮，美目盼兮，素以為絢兮。』何謂也？」子曰：「繪事後素。」曰：「禮後乎？」子曰：「起予者商也！始可與言《詩》已矣。」(乙)子夏曰：「日知其 所亡，月無忘其所能，可謂好學也已矣。」根據這兩段引文，子夏應列在孔門四科中的哪一科

答案: 文學

What would happen to the equilibrium price and quantity of coffee if the wages of coffee-bean pickers fell and the price of tea fell?

答案: Price will fall and the effect on quantity is ambiguous

Suppose there are only two firms supplying in the market and they produce a homogeneous good. Two firms produce the good with the same constant marginal cost. Firms compete by setting price simultaneously . The equilibrium price of both firms must

答案: equal to the marginal cost.

「Last October, due to an early frost, the price for a pumpkin increased by 10 percent.As a result, the quantity demanded decreased from 2 million to 1.5 million.」 Based on this statement, the

答案: demand for pumpkins is elastic.

Which of the following factors would not cause the demand curve for a given product to shift?

答案: Changes in price.

You are an economist for the Taipei City Subway Commission. Presently, the price of a subway ride is $80, and 250,000 seats are filled weekly. The income elasticity of demand is -0.60. If a recession lowered area incomes by 5％, how many additional seats per week would the subway need?

答案: 7,500 seats

 

A firm in pure competition would shut down when

答案: price is less than average variable cost.

The figure shows the market for books before and after a sales tax is introduced. The tax on books is ____ a book, buyers pay ____ of tax per book, and the governments tax revenue is ____.

答案: $1.20; $0.80; $12

Producer surplus is the :

答案: difference between revenue and variable cost of production.

The most fundamentaleconomic problem is

答案: scarcity.

Consumer surplus is:

答案: the difference between the price one is willing to pay and the price one has to pay

for the function f(X)=3√x(x-7)²
which of the following statements are true ?

答案: f (7) = 0 is a relative minimum

The demand for a product tends to be inelastic if.

答案: a small proportion of consumer's income is spent on the good.

A simple linear demand function may be stated as Q= a-bP+cI where Q is quantity demanded , P is the product price, and I is consumer income. To compute an appropriate value for c, we can use observed values for Q and I and then set the estimated income elasticity of demand equal to.

答案: c(I／Q)

If resources are used efficiently, then ____.
答案: consumer surplus plus producer surplus is maximized

A decrease in the supply

答案: raises its equilibrium price and decreases its equilibrium quantity.

Which paradigm most accurately describes BASIC?

答案: Imperative or procedural

The demand for Chocolate Chip Cookie ice cream is likely quite elastic because
答案: other flavors of ice cream are good substitutes for this particular flavor.

Each standard library has a corresponding:

答案：Header file

 

Each standard library has a corresponding: 

答案： Header file

Crude oil can be refined into home heating oil or gasoline. If very cold weather caused the price of home heating oil to increase, then 

答案：the equilibrium price of gasoline would rise.

Bonds that have an option exercisable by the issuer to retire them at a stated dollar amount prior to maturity are known as: 

答案 :Callable bonds.

If a fall in the price of good A increases the quantity demanded of good B, 

答案: A and B are complements

Suppose the price elasticity of demand for tickets of Taiwan High Speed Railway (THSR) is 1.5.Ceteris paribus, when THSR reduces its prices, its revenue 

答案: will go up.

Good A and good B are substitutes in production. The demand for good A increases so that the price of good A rises. The increase in the price of good A shifts the 

答案: supply curve of good B leftward.

If the market price is higher than the equilibrium price. 

答案: a surplus exists and the market price will fall until it equals the equilibrium price and the surplus is eliminated.

The statement “An increase in the price of gasoline will lead to a decrease in the amount purchases” is 

答案 : a positive statement

If a price increase of 5 percent increases the quantity demanded of another good by 2 percent, the goods must be and the cross elasticity of demand equals 

答案 : substitutes; 0.4.

Apples and oranges are substitute goods. A freeze in Florida destroyed a good portion of the orange crop. Ceteris paribus, the price of 

答案: both apples and oranges will rise.

Two goods are complements if a decrease in the price of one good 

答案: increases the demand for the other good.

which of the following would be most likely to cause the demand for cheese to shift from d0 to d1 

答案: an increase in income, assuming cheese is a normal good 

Which of the following statement is normative？ 

答案: Higher taxes are needed to support education.

Which of the following is an imperative programming language? 

答案: Ada

For a good that is a necessity,

答案: demand tends to be inelastic.