y=1/2sin(π/3-2x/3)的单调区间
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y=1/2sin(π/3-2x/3)的单调区间
y=1/2sin(π/3-2x/3)的单调区间
y=1/2sin(π/3-2x/3)的单调区间
y=1/2sin(π/3-2x/3)
=-1/2sin(2x/3-π/3)
-π/2+2kπ
单增区间:-pi/2+2k*pi<=pi/3-2x/3<=pi/2+2k*pi,同理可得到单减区间,做出函数图像观察