已知f(x)=-4cos2(平方)x+4(根号3)asinxcosx,将f(x)的图像向左平移π／4…

1）f平移后的函数为
-4cos2(平方)（x+π/4)+4(根号3)asin(x+π/4)cos(x+π/4)-2
=-2[1+cos(2x+π/2)]+2(根号3)asin(2x+π/2)-2
=-2cos(2x+π/2)+2(根号3)asin(2x+π/2)-4
=2sin2x-2(根号3)acos2x-4
最小正周期为π,a=-1
=4sin(2x+π/3)-4
2)f=-4sin(2x+π/3)-2
x€[π/6,2π/3]
|f(x)|€[2gen3-2,2gen3+2]
|f(x)-m|