f(x)=-4sin(2x+π/6)-1的单调区间是多少?
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f(x)=-4sin(2x+π/6)-1的单调区间是多少?
![f(x)=-4sin(2x+π/6)-1的单调区间是多少?](/uploads/image/z/16560309-21-9.jpg?t=f%EF%BC%88x%EF%BC%89%3D-4sin%EF%BC%882x%2B%CF%80%2F6%EF%BC%89-1%E7%9A%84%E5%8D%95%E8%B0%83%E5%8C%BA%E9%97%B4%E6%98%AF%E5%A4%9A%E5%B0%91%3F)
F'=-8cos(2x+π/6),
F'=0,X=-π/3,π/6
-7π/12〈X〈-π/3,F'大于0,增区间
-π/3≤x≤π/6,F'小于0,减区间
π/6〈x《5π/12,F'大于0,增区间
F'=0,X=-π/3,π/6
-7π/12〈X〈-π/3,F'大于0,增区间
-π/3≤x≤π/6,F'小于0,减区间
π/6〈x《5π/12,F'大于0,增区间
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