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这种试题有时代气息,题型设计新颖精巧,涉及的内容广泛,因而有较强的综合性.很值得研究. 1.“影碟机销售”问题例1 有一家影碟机(VCD)原销售价为每台800元,在甲、乙两家家电商场均有销售.甲商场用如下方法促销:买一台单价为780元,买两台每台单价都为760元,依次类推,每多买一台则所买各台单价均再减少20元,但每台最低不能低于440元;乙商场一律都按原价的75%销售.某单位需购买一批此类影碟机,问去哪家商场购买花费较少?
This test has a contemporary flavor, novelty and intricate question design, and involves a wide range of content, and therefore has a strong comprehensive. It is worth studying. 1. “Satellite machine sales” problem Example 1 There is a DVD player (VCD) original sales price For each 800 yuan, in both A and B home appliances stores have sales. A mall using the following methods to promote: buy a unit price of 780 yuan, buy two units for each unit price is 760 yuan, and so on, by analogy, each to buy The unit price for each unit bought is reduced by another 20 yuan, but each unit can’t be lower than 440 yuan; B malls are all sold at 75% of the original price. A unit needs to buy a batch of such players and ask which one to go to. Shopping malls spend less money?