y=2sin(2X-pai/6)的单调区间,对称轴,当X=?Y有最大值?当X=?Y有最小值?
问题描述:
y=2sin(2X-pai/6)的单调区间,对称轴,当X=?Y有最大值?当X=?Y有最小值?
答
很简单的问题:正弦函数sinx的单调增区间为[-π/2 + 2kπ,π/2 + 2kπ],单调减区间为[π/2 + 2kπ,3π/2 + 2kπ] (k∈Z)所以{x|-π/2 + 2kπ≤2X-π/6≤π/2 + 2kπ}为y=2sin(2X-π/6)的单调增区间,{x|π/2 + 2kπ...