题目

The beat generation mainly referred to the youth who were born and brought up around the Second World War. They showed their ignorance of almost everything traditional, such as government authority ,respect for parents, one’s duty, moral standards, and traditional customs. They developed a kind of absolute individualism and liberty. They preferred long hair, mini dresses or close fitting clothes to show off the figure. They advocated （倡导）freedom of sex and cohabitation (同居).Their influence could be seen from the fact that about one third of the American couples living together we已知函数 ， ．（I）求 的单调区间；（II）若对任意的 ，都有 ，求实数 的取值范围．