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课本上的例题都是很典型的题目,同学们在学习的过程中,不仅要领悟课本例题的命题意图,更要掌握其求解思路,并能进行方法的迁移,解决与其相同或相近的问题.现就课本上的一道例题加以说明,供学习时参考.问题(人教版九年级数学教材上册第46页例题)两年前生产1吨甲种药品的成本是5000元,生产1吨乙种药品的成本是6000元,随着生产技术的进步,现在生产1吨甲种药品的成本是3000元,生产1吨乙种药品的成本是3600元.哪种药品的成本的年平均下降率较大?
The examples in the textbooks are all typical topics. Students should not only comprehend the propositional intent of the textbook examples, but also grasp their solutions, and be able to migrate the methods to solve the same or similar problems. Now on the textbook an example to illustrate for reference for learning.Position (People’s Education Edition ninth grade mathematics textbook on the book on page 46 example) two years ago, the cost of producing 1 tonne of Class A drugs is 5,000 yuan, the production of 1 ton of B The cost of medicine is 6,000 yuan, with the advancement of production technology, the cost of producing 1 ton of class A medicine is 3,000 yuan, the cost of producing 1 ton of class B medicine is 3,600 yuan, and the annual average rate of decline of the cost of which medicine is more Big?