【简答题】(本小题满分16分) 已知 f ( x )、 g ( x )都是定义在R上的函数,如果存在实数 m 、 n 使得 h ( x ) = m f ( x )+ ng ( x ),那么称 h ( x )为 f ( x )、 g ( x )在R上生成的一个函数. 设 f ( x )= x 2 + ax , g ( x )= x + b ( R), = 2 x 2 +3 x -1, h ( x )为 f (...
【单选题】People in both Britain and the United States speak English. However, some words have different meanings. In the U.S. a holiday is a special day of celebration. A holiday is a vacation in Britain. An e...