题目

设函数是定义域为的奇函数.(1)求的值.(2)若,试求不等式的解集;(3)若在上的最小值为,求m的值. 答案:【答案】(1)1;(2)或;(3).【解析】(1)由函数f(x)是定义域为R的奇函数,可得f(﹣x)+f(x)=0对于任意实数都成立.即可得出k;(2)由(1)可知:f(x)=ax﹣a﹣x,利用f(1)>0,解得a.可得f(x),利用定义法证明即可;(3)由于a=2,可得g(x)=a2x+a﹣2x﹣2f(x)=(2x﹣2﹣x)2﹣2(2x书面表达(共1题,计15分)新海浪乐队是一支受欢迎的乐队。以下是有关这支乐队的一些信息,请根据所给的信息写一篇报道,不少于80词。Name of Band: New Ocean WavesIt was founded in October of 2004The things they have done:1. had three major concerts2. made a hit CD3. won the best new group of the yearThe things they are going to do:1. to appear on CCTV2. to go on a world tour next month3. to have a number one hit some day                                                                                                                                                                                                                                                                                                                                                                                            
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