第1个回答 2012-12-08
1、周期:
3T = 2π
T = 2π/3
2、单调区间
(1)增函数:
2kπ - π/2 ≤ 3x + π/3 ≤ 2kπ + π/2
2kπ/3 - 5π/18 ≤ x ≤ 2kπ/3 + π/18
(2)减函数:2kπ + π/2 ≤ 3x + π/3 ≤ 2kπ + 3π/2
2kπ/3 + π/18 ≤ x ≤ 2kπ3 + 7π/18
3、最大值:
x = 2kπ/3 + π/18:y = 2
4、最小值:
x = 2kπ/3 - 5π/18:y = -2本回答被网友采纳