f(x)=2*(√3/2*sin(x+π/6)+1/2*cos(x+π/6))=2sin(x+π/6+π/6)=2sin(x+π/3) ,
其对称轴满足 x+π/3=π/2+kπ ,
因此对称轴方程为 x=π/6+kπ ,k∈Z .
令 k=0 可得一条对称轴方程为 x=π/6 .