已知函数满足且在区间上单调递减,则满足不等式的的取值范围是______________.
函数的值域是______________.
设则___________;若,则______________.
(1)函数定义域为____________________.
(2)已知,则函数的解析式为_______________________.
设全集,,,则______________,______________.
若函数,在上满足对于任意的实数,都有成立,则实数的取值范围是( )
A. B. C. D.