例1(初中物理沪科版第一册83页)在测定液体密度时,有一同学测出了液体的体积,容器和液体的总质量,实验做了两次,记录如下: 试求:(1)液体的密度;(2)容器的质量常规解法是列方程组求解ρ_(1液)=m_(1总)-m_容/V_1……①ρ_(2液)=m_(2总)-m_容/V_2……②①②联立求出m_总、ρ_液,这样解法较繁琐,对数学水平要求也较 Example 1 (83 pages of the first edition of the junior high school physics science edition) In determining the liquid density, one classmate measured the volume of the liquid, the total mass of the container and the liquid, and the experiment was done twice. The record was as follows: ) The density of the liquid; (2) The quality of the container The conventional solution is to solve the equations for the equation ρ_(1 fluid)=m_(1 total)−m_capacity/V_1...1ρ_(2 fluids)=m_(2 total)−m _Rong/V_2...212 is used to determine m_total and ρ_liquid. This solution is more tedious and requires more mathematics.