题目

为实数,函数在区间上的最大值记为. 当_________时,的值最小. 答案:【答案】.【解析】因为函数,所以分以下几种情况对其进行讨论:①当时,函数在区间上单调递增,所以;②当时,此时,,而,所以;③当时,在区间上递增,在上递减.当时,取得最大值;④当时,在区间上递增,当时,取得最大值,则在上递减,上递增,即当时,的值最小.故应填.  Only when I lost the opportunity to take my first job ____ how important it was to me.    A. I realized   B. I had realized    C, had I realized   D . did I realize
数学 试题推荐