一,已知f(x)= x+2 (x≦-1) f(x)= x^2 (-1

问题描述:

一,已知f(x)= x+2 (x≦-1) f(x)= x^2 (-1

你好!
1、f(-1.5) = -1.5+2 =0.5
f[f(1.5)] =f(0.5) = 0.25
2、分a在≤-1,-1