(16)f(x)=-2 ; x≤-3=|x|-2x ; -3=2x-1 ; x≥3-1000≤-3f(-1000)= -2 f(f(-1000))=f(-2)= |-2| -2(-2) = 2+4 =6f(f(f(-1000)))= f(6) = 2(6)-1 =11
很多东西了
