Because it is a power function, m 2-3m+3 = 1 becomes (m- 1)(m-2)=0, that is, m= 1 or m=2, and the graph does not pass through the origin, so m2-m-2≦-0 is m. 。

Because the power is 1/2, 4+m > 0,3-2m > 0,4+m < 3-2m equals-4 < m.