文[1]给出了一个命题,并利用该命题简解了一类问题:“对x≥0,f(x)≥g(x)或f(x)≤g(x)恒成立,其中f(x)含参数a,试确定参数a的取值范围.”简解程序是:对x≥0,只要对f(x)≥g(x)或f(x)≤g(x)两边取导数,再从f′(x)≥g′(x)或 A proposition is given in [1], and a kind of problem is solved by using the proposition: “For x≥0, f (x) ≥g (x) or f (x) ≤g , Where f (x) contains the parameter a, try to determine the range of the value of the parameter a. ”The procedure is: For x≥0, as long as f (x) ≥g x) Derivatives on both sides, from f ’(x) ≥g’ (x) or