题目

若函数是定义在上的偶函数，在上是减函数，且一个零点是2，则使得的x的取值范围是______. 答案：【答案】【解析】根据函数的奇偶性和单调性之间的关系，将不等式进行转化，结合图象，即可求解.由函数是定义在上的偶函数，在上是减函数，所以函数在为增函数，且，作出函数的图象，如图所示，则不等式的解为，故不等式的解集为.故答案为：.短文改错。增加：在缺词处加一个漏词符号（∧），并在此符号下面写出该加的词。删除：把多余的词用斜线（\）划掉。修改：在错的词下划一横线，并在该词下面写出修改后的词。注意： 1、每处错误及其修改均仅限一词；2、只允许修改10处，多者（从第11处起）不计分。One day a lady saw a mouse running across his kitchen floor. She was very afraid of mice, so she ran out of the house, getting on a bus and went to a nearby shop. Here she bought a mousetrap and was advised to put some cheese in it. The lady went home with her mousetrap, and could not find any cheese. She had no choices but to cut a picture of some cheese out of a magazine and put it in the trap. Surprising, the picture of the cheese is quite “successful”! When the lady came down to the kitchen in the next morning, she found a picture of mouse in the trap besides the picture of the cheese!