通过多年的高考试卷看,求参数的取值范围问题一直是高考考查的重点和热点,同时也是一个难点,考生通常会感到难度较大,以至于得分不高,比如下面这个高考题:原题设函数f(x)=ax3-3x+1(x∈R),若对于任意的x∈-1,[1]都有f(x)≥0成立,则实数a的值为_____.这是2008年时的江苏高考最后一个填 Through many years of examinations, the question of finding the range of parameters has always been the focus and hot spot of the college entrance examination. It is also a difficult point. Candidates often feel that the difficulty is so high that the score is not high, such as the following college entrance examination questions: Let function f(x)=ax3-3x+1(x∈R), if for any x∈-1, [1] has f(x)≥0, then the value of real a is _____. Is the final fill of the Jiangsu college entrance examination in 2008