求导f(x)=2sin(2x-π/3)+1 或画图
f'(x)=4cos(2x-π/3)
f(x)的单调增区间
f'(x)大于等于0
X=[-π/12+kπ,5π/12+kπ]
(2)X=-π/12+Kπ/2
(π/6+Kπ/2,0）