设有最大值,则不等式的解集为 .
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?_______
若a>0,a1,F(x)为偶函数,则G(x)=F(x)·log(x+)是_______函数(填“奇”或“偶”),它的图像关于______对称。