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20 0 1年全国高考数学应用题 (理 2 1题 ) :从社会效益和经济效益出发 ,某地投入资金进行生态环境建设 ,并以此发展旅游产业 .根据规划 ,本年度投入 80 0万元 ,以后每年投入将比上年减少 1 /5 .本年度当地旅游业收入估计为 40 0万元 ,由于该项建设对旅游业的促进作用 ,预计今后
The mathematics application problem of the National College Entrance Examination in 2001 (Dr. 21 problem): From the perspective of social and economic benefits, a certain place invested funds for ecological environment construction, and to develop the tourism industry. According to the plan, this year’s investment is 800,000 yuan. In the future, the annual investment will be reduced by 1/5 compared with the previous year. The local tourism revenue is estimated to be 400 thousand yuan this year. Due to the promotion of the tourism industry, it is expected that the