已知函数y={4-x^2(x>0),2(x=0),1-2x(x

问题描述:

已知函数y={4-x^2(x>0),2(x=0),1-2x(x

(1)画出函数f(x)的图像(2)求f(a 2;+1)(a∈R),f(f(3))f[f(3)]=4-(4-3 2;) 2;=-21 f(x)≤9: 0≤9 1-2x≤9 4-