对 x≥0,y≥0,调和平均数、几何平均数、算术平均数、平方平均数满足2/(1/x+1/y)≤xy~(1/2)≤(x+y)/2≤(x~2+y~2)/2~(1/2).这是高中数学最为经典的基本不等式关系.在物理的最值问题过程中,可以采用不同的关系式来求解.下面就是应用以上基本不等式关系来求解物理中的最值问题.例1 如图1所示电路图中,R_1=2Ω,R_2=3Ω,滑 For x ≥ 0, y ≥ 0, the harmonic mean, geometric mean, arithmetic mean, square mean satisfies 2/(1/x+1/y)≤xy~(1/2)≤(x+y) /2≤(x~2+y~2)/2~(1/2). This is the most classic basic inequality relationship in high school mathematics. In the process of the physics maximum value problem, different relations can be used to solve. The following is the application of the above basic inequality relations to solve the problem of the maximum value in the physical. Example 1 In the circuit diagram shown in Figure 1, R_1 = 2Ω, R_2 = 3Ω, slip