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数学作为现代文化的重要组成部分,正广泛渗透到自然科学和社会科学的各个领域。让学生亲身经历将实际问题抽象成数学模型,并加以理解与应用的过程,培养学生应用数学的意识和能力,提高学生的数学素养,是数学教学的重要任务。增减比率问题是数列型开放应用题中的一类具有特殊研究价值的问题。无论是社会经济发展的速度、人口增长的控制、自然资源的保护和合理利用,还是分期
As an important part of modern culture, mathematics is widely permeated into various fields of natural sciences and social sciences. It is an important task for mathematics teaching that students should experience the abstraction of practical problems into mathematical models, understand and apply them, cultivate students 'awareness and ability in applied mathematics and improve students' mathematical accomplishment. The problem of the rate of increase or decrease is one of the open-ended applications of the series with special research value. Whether it is the speed of socio-economic development, the control of population growth, the conservation and rational utilization of natural resources,