某市
有4个郊县(
、
、
、
),如图.现有5种颜色,问有多少种不同的着色方法,使得相邻两块不同色,且每块只涂一种颜色?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2018/12/14/2096455798751232/2097584131293184/STEM/30546760d8a14ec3b08a6f7b205a5634.png?resizew=104)
2003高三·安徽·竞赛 查看更多[1]
更新时间:2018-12-15 23:28:45
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解答题-问答题
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适中
(0.65)
【推荐1】1,2,3,4,5的排
具有性质:对于
,
不构成
的某个排列.求这种排列的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0334155f15ce1b96c933771cfaddbe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a6a5ae642f5c6b5da6fca20c62a29a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59ba68293cc0069b3b57efdfbb2e52e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d841d6eb926cbd5291949d6ecca8cdfd.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】圆周上有
个点
,用弦两两连结起来,其中任何3条弦都不在圆内共点.现将由此形成的互补重叠的圆内区域的个数记为
.
(1).直接画图求出
,
,
,
,
;
(2).确定
的表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e276e27bee0f5274ecfd945d393e826.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bfccafa83afe5ee21eab6ef2b2c8852.png)
(1).直接画图求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb5ca241bb7c313ef0366d3ddba93bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cbeed5324c432101be517dd6f5c735b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d199f9235e3bd36bfa78c3772e941896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feaf542829b99205948fa97442c3db92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05c2f981c2c9d55dbea8172ff5ccf0db.png)
(2).确定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bfccafa83afe5ee21eab6ef2b2c8852.png)
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