2 、{ y & gt0}
3、2
4、f(x)=-x？
5、a & lt 12
6.(2,2.5)
7、m & lt2
8. Range (-32,4)
There are too many formula symbols in the detailed process to type. I'm sorry to give you only my final answer.
① There is a specialized course in the curriculum structure of primary education major in Fujian Normal University, which is divided into Chinese,