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表示自变量和因变量之间关系的数学式子称为关系式.利用关系式我们可以根据任何一个自变量的值求出相应的因变量的值.知道两个变量的变化趋势,可进一步研究问题的特征.那么如何才能正确地确定两个变量之间的关系式呢?具体地说,和列一元一次方程解应用题的方法基本类似,即弄清题意和题目中的数量关系,找到能够表示题目中全部含义的一个相等的数量关系式,根据这个相等的关系式,列出所需的代
The mathematical formula representing the relationship between the independent variable and the dependent variable is called a relational expression. Using the relational expression, we can find the value of the corresponding dependent variable based on the value of any one of the independent variables. Knowing the trend of the two variables can be further studied. The characteristics of the problem. Then how can we correctly determine the relationship between the two variables? Specifically, the method of solving problems with the equation of a one-line equation is basically similar, that is, to clarify the relationship between the meaning of the problem and the number of questions, find An equal number relation that can express all the meanings in the title, based on this equal relation, lists the required generations