Question

（本小题满分13分）

已知函数．

（Ⅰ）求的值；

（Ⅱ）求的最大值及单调递增区间．

Answer 1

解：（Ⅰ）                                

， 2                                                                                                                                                                                                                                                                                                                                                                                                            

所以．                            

（Ⅱ）当（）时，的最大值是．                 

由 ，，

得 ，．

所以的单调递增区间为，．

解析:

略