题目

若函数和同时在x＝t处取得极小值，则称和为一对“函数”． （1）试判断与是否是一对“函数”； （2）若与是一对“函数”．①求a和t的值；②若a＜0，若对于任意[1，)，恒有，求实数m的取值范围． 答案： Those people have been to Shenyang, Dalian, Shanghai, ________Guangzhou. A. too            B. as well        C. as well as      D. also have