已知集合
.
(1)求集合
和
;
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d036a4090e8ee8e3e351c25edb8f1895.png)
(1)求集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da331a8c58b97333fcf642c92f089e0c.png)
更新时间:2019-12-06 14:19:03
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【推荐2】已知集合![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
,集合
.
(1)分别用区间表示集合
和
,求
;
(2)求
,(
)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/321a57dd129e992d7834e91961987bd1.png)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c88153d70d57b3e09893cea17dfc44a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6b169a21fdbb42adb9dbed8ce3dda99.png)
(1)分别用区间表示集合
![](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/ae3516cead1976248defbf1ffe368170.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae3516cead1976248defbf1ffe368170.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/321a57dd129e992d7834e91961987bd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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【推荐1】经过长期观测得到:在交通繁忙的时段内,某公路段汽车的车流量y(千辆/小时)与汽车的平均速度υ(千米/小时)之间的函数关系为:
.
(1)在该时段内,当汽车的平均速度υ为多少时,车流量最大?最大车流量为多少?(保留分数形式)
(2)若要求在该时段内车流量超过10千辆/小时,则汽车的平均速度应在什么范围内?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8792ce2fa9b856c336e83c608f26c9a4.png)
(1)在该时段内,当汽车的平均速度υ为多少时,车流量最大?最大车流量为多少?(保留分数形式)
(2)若要求在该时段内车流量超过10千辆/小时,则汽车的平均速度应在什么范围内?
您最近一年使用:0次
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名校
解题方法
【推荐2】已知集合
,集合
,集合
.
(1)求
;
(2)若
,证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abb4d649510be96510b49fd72188317b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e24f6556b5d20123d3015ccdc6efebe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70975b7457f3bd28fcd620a0acddcb24.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0899a23c018a1f574b02688c23529d2f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a59de2d758d7a11fc3bd9479bdcb2012.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc020b0997a2f37b214718112b79d8e.png)
您最近一年使用:0次