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.
【简答题】A.It is a network for shopping malls, offices and homes. B.It relieves the heavy burden of teachers in school. C.It simplifies the process of friends online. D.It quickens sales of software pro...
【简答题】A.It is a network for shopping malls, offices and homes. B.It relieves the heavy burden of teachers in school. C.It simplifies the process of friends online. D.It quickens sales of software pro...