已知函数 f ( x )=- x 2 +8 x , g ( x )=6ln x + m . (1)求 f ( x )在区间[ t , t +1]上的最大值 h ( t ); (2)是否存在实数 m 使得 y = f ( x )的图象与 y = g ( x )的图象有且只有三个不同的交点?若存在,求出 m 的取值范围;若不存在,说明理由.
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
皮皮学刷刷变学霸
举一反三
【单选题】What can be inferred about the woman?
A.
She is surprised by the fact the professor shared,
B.
She is concerned that she misheard the professor.
C.
She is not sure about a term the professor just used.
【简答题】2 I was reminded of this sad fact at a party when a fellow guest asked me the subject of a book I was planning to write. What is the “sad fact”? What does this choice of word tell us about the writer’...