y=3sina(π/3-2x)的单调递增区间是选项:A.[2kn-n/2,2kn+n/2] (k属于Z) B.[2kn+n/2,2kn+3n/2](k属于Z)C.[kn+5n/12,kn+11n/12](k属于Z)D.[kn-n/12,kn+5n/12](k属于Z)补充说明一下,因为圆周率那个pai打不出来,所以用“n”代
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![y=3sina(π/3-2x)的单调递增区间是选项:A.[2kn-n/2,2kn+n/2] (k属于Z) B.[2kn+n/2,2kn+3n/2](k属于Z)C.[kn+5n/12,kn+11n/12](k属于Z)D.[kn-n/12,kn+5n/12](k属于Z)补充说明一下,因为圆周率那个pai打不出来,所以用“n”代](/uploads/image/z/5918265-9-5.jpg?t=y%3D3sina%28%CF%80%2F3-2x%29%E7%9A%84%E5%8D%95%E8%B0%83%E9%80%92%E5%A2%9E%E5%8C%BA%E9%97%B4%E6%98%AF%E9%80%89%E9%A1%B9%EF%BC%9AA.%5B2kn-n%2F2%2C2kn%2Bn%2F2%5D+%28k%E5%B1%9E%E4%BA%8EZ%EF%BC%89+B.%5B2kn%2Bn%2F2%2C2kn%2B3n%2F2%5D%28k%E5%B1%9E%E4%BA%8EZ%29C.%5Bkn%2B5n%2F12%2Ckn%2B11n%2F12%5D%28k%E5%B1%9E%E4%BA%8EZ%29D.%5Bkn-n%2F12%2Ckn%2B5n%2F12%5D%28k%E5%B1%9E%E4%BA%8EZ%29%E8%A1%A5%E5%85%85%E8%AF%B4%E6%98%8E%E4%B8%80%E4%B8%8B%2C%E5%9B%A0%E4%B8%BA%E5%9C%86%E5%91%A8%E7%8E%87%E9%82%A3%E4%B8%AApai%E6%89%93%E4%B8%8D%E5%87%BA%E6%9D%A5%2C%E6%89%80%E4%BB%A5%E7%94%A8%E2%80%9Cn%E2%80%9D%E4%BB%A3)
y=3sina(π/3-2x)的单调递增区间是选项:A.[2kn-n/2,2kn+n/2] (k属于Z) B.[2kn+n/2,2kn+3n/2](k属于Z)C.[kn+5n/12,kn+11n/12](k属于Z)D.[kn-n/12,kn+5n/12](k属于Z)补充说明一下,因为圆周率那个pai打不出来,所以用“n”代
y=3sina(π/3-2x)的单调递增区间是
选项:A.[2kn-n/2,2kn+n/2] (k属于Z)
B.[2kn+n/2,2kn+3n/2](k属于Z)
C.[kn+5n/12,kn+11n/12](k属于Z)
D.[kn-n/12,kn+5n/12](k属于Z)
补充说明一下,因为圆周率那个pai打不出来,所以用“n”代替啦~
我算出来的结果,这里面一个都没有~
y=3sina(π/3-2x)的单调递增区间是选项:A.[2kn-n/2,2kn+n/2] (k属于Z) B.[2kn+n/2,2kn+3n/2](k属于Z)C.[kn+5n/12,kn+11n/12](k属于Z)D.[kn-n/12,kn+5n/12](k属于Z)补充说明一下,因为圆周率那个pai打不出来,所以用“n”代
y=3sin(π/3-2x)
单调递增:
2kπ-π/2
y=sin(π/3-2x)=-sin(2x-π/3)
2kπ+π/2≤2x-π/3≤2kπ+3π/2
kπ+5π/12≤x≤kπ+11π/12
故增区间是[kπ+5π/12, kπ+11π/12]
正弦函数的单调区间,第四、一象限是单调递增的;第二、三象限是单调减函数2sin(π/4 -x)可以看成是复合函数。它是由y=sint和t=π/4 -x复合
递增:当y=3时π/3-2x=π/2 x=-1/12π+kπ
当y=-3时,π/3-2x=3π/2 x=-7/12 π+kπ
答案;(5/12π+kπ,11/12 π+kπ) D