1 . 已知直三棱柱
的所有棱长均为4,空间内的点
满足
,且
,则满足条件的
所形成曲线的轨迹的长度为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ca0ae010ee25d83b44a3677a7af48c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/580a198213b6607315de8d02d3eff82e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
您最近一年使用:0次
名校
2 . 如图,正方体
的棱长为4,点M是棱AB的中点,点P是底面ABCD内的动点,且P到平面
的距离等于线段PM的长度,则线段
长度的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655c413f509068d30b165f9d92bdba0.png)
![](https://img.xkw.com/dksih/QBM/2022/5/7/2974373158027264/2974997082980352/STEM/2470bbd207ba40beb77eff715ec60baf.png?resizew=155)
您最近一年使用:0次
2022-05-08更新
|
2400次组卷
|
11卷引用:陕西省榆林市2022届高三下学期四模理科数学试题
解题方法
3 . 已知三棱锥
中,
,
,
,
.关于该三棱锥有以下结论:①三棱锥
的表面积为
;②三棱锥
的内切球的半径
;③点
到平面
的距离为
;④若侧面
内的动点
到平面
的距离为
,且
,则动点
的轨迹为抛物线的一部分.其中正确结论的序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9b8e7befcb7881c294070175b1a554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d00c750e915d7f9a7460970a4199071f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9641d01140939c44450bf39773272af6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa37aefb6d45efe4e20ba48c2e7dfa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2c966fa765420ae547f83e28dcc997a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/266e095e1f7a31646992a5b7fac251d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
A.①② | B.③④ | C.① ②③ | D.①②③④ |
您最近一年使用:0次
4 . 如图,三棱锥
中,
,
,
,点
在侧面
上,且到直线
的距离为
,则
的最大值是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db3ea735e48e1c2d81554d89656326.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7d2a2da5144f0bf6ce091c56b3d5a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce0249a3ff99c083fa4421877549db1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/2019/3/12/2159113788645376/2159847103979520/STEM/40150b6a-803c-44ac-b74d-8c269a7b2312.png)
您最近一年使用:0次
2019-03-13更新
|
1126次组卷
|
6卷引用:2020届陕西省榆林市第二中学高三下学期3月月考数学(理)试题
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