题目

阅读理解  阅读下面短文，根据短文内容选择最佳答案An Englishman, a Frenchman and a Russian were discussing happiness. Happiness, said the Englishman, Happiness is when you return home tired after work, yet find your slippers(拖鞋) warming by the fire. You English have no romance, said the Frenchman. Happiness is when you go on a business trip, meet a pretty girl who entertains(招待) you －then afterwards you part（分手）without regrets.You are both wrong, said the Russian. True happiness is when you are at home in bed and at 4:00 a.m., you hear a ring at the door（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．