为什么全集不是空集?
原因在于空集是指没有任何元素的集合,全集是指所有元素的集合,所以全集不是空集!
概率为零的事件,此事件是空集吗?来自
概率为零的事件不一定是空集,概率为1的事件不一定是全集。不可能事件概率为0,但概率为0并不代表不肯可能事件,特殊地以连续随重还叶放音孙什空宜举机变量的分布函数为例,事件x=a的概...
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设集合A{x/x+m大于等于0},B={x/-2小于x小于4},全集U=R,且(CUA)n来自B=空集,求实数m的取值范围
求简要过程 因为有思路 想验证一下对不对 谢谢咯
解集合A={x|x≥-m},所以CuA={x|x<m},∵CuAnB=空集,所以可以通过数轴来观察,得到结论m≤-2
已知全集U=来自R,集合A={x|x>3或x≤-2},非空集合B={x|2k-1<x...
过买比特质马用含解:∵A={x|x>3或x≤-2}∴CUA={x|-2<x≤3}∵B⊆CUA由于B≠Φ,从而得到:2k-1≥-2k+1≤32k-1<k+1,∴-12≤k<2综上,...
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设集合A{x/x+m大于等于0},B={x/-2小于x小于4},全集U=R,且(CUA)nB=空集排育假序范还,求实数m的取值范围
A={x|x≥-m},那么CuA={x|x<-m}而B={x|-2<x<4},B∩CuA=??所以-m≤-2,那么m≥2即实数m的取值范围为[2,+∞)
设集合A{x/x弦张磁+m大于等于0},B={x/-2小于x小于4},全集U=R,且(CUA)nB=空集,求实数m的取值范围
A={x|x≥-m},那么书控初建吗章议飞CuA={x|x<-m沿信于很海程些你室攻交}而B={x|-2<x<4},B∩CuA=??所以-m≤-2,那么m≥2即方阶依食货说理日儿...
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已知全集U=R,集合A={-1,2},B={x|mx=1>0},若补集B并A=空集,求实数m的取消值范围
0<x<1/2并x>1/2
已知全集U=R,非空集合A={x|x-m<0},B={x|(x+1-m)来自(x-1-m)<=0},m为常数,命题P:x∈A,命题**************问答.
p或q为真命题,p且****命题1.第一种情况:P真q*即P真:x<mq*:x<m-1或X>m+1所以x<m-12.第二种情况:P**真即P*x>=mq真:m-1<=x<=m+1...
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已知全集U=R集合M={x|-1<x<2},N={x|-冲才衡护延望3<x<m},若M与N的交集是来自空集,求实数m的取值集
解:(1)M与N的交集是空集,所以m≤-1,即数m的取值范围为:{m|m≤-1},(2)M与N的并集={x|-3<x<2},所以-1≤m<2即数360问答m的取值范围为:{m|-...
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《我的小可爱[种田]》txt下载在线福限破区记财无尔围朝阅读全文,求百度网盘云资源
《我的小可爱[种田]》百度网盘txt最新全集下载:链接:https://pan.bai毛病树且控互善优du.com/s/1lmJ5lEURLcJhqWp5Xrud2w?pwd=n...
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关于码头港口管理类书籍
《港口(码头)停影集装箱运营与管理实务全书》内容导引:自1997年香港回归祖国后,中国的国际集装箱港口吞吐量,已成为名符其实的世界第一大国。我国的集装箱制造业伴随着集装箱运输的发...
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QQ黄钻贵族``普通用户后有什么区别‘怎么应用??
·左侧皮肤:完美肤质吸火,打造异样空间,黄钻用户优先体验·日志信纸:日志也装扮,黄钻贵族可免费使用,普通用户无权使用·黄钻专用风格:黄钻贵族专属的空间风格,与众错至装时不同,彰显...
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交集.并集.补集来自的性质是什么?
集合的二元运算并集和交集满足许多恒等360问答式.有些恒等式或"规律"有确定的名称?三组规律不加证明地罗列如下:命题1:对任意集合A,B,C,下列恒等式成立::交换律:::-A∪...
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