某学生在复习函数内容时,得出如下一些结论:①函数在上有最大值;②函数在上是减函数;③,使函数为奇函数;④对数函数具有性质“对任意实数,,满足”其中正确的结论是_______.(填写你认为正确结论的序号)
设是定义在R上的奇函数,且满足,则
已知幂函数的图象过点,则
函数的定义域是
A class collects $50 to buy flowers for a classmate who is in the hospital. Roses cost $3 each, and carnations cost $2 each. No other flowers are to be used. How many different bouquets could be purchased for exactly $50?_______