23-24高二下·江苏·期末
解题方法
1 . 已知随机变量X的分布列为则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
________ ;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/981a1cde2aefb846d30f461a39a1d062.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/981a1cde2aefb846d30f461a39a1d062.png)
X | 0 | 10 | 100 |
P | 0.81 | ![]() | 0.09 |
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2 . 如图所示:在一个无限延展的平面上,铺满了边长为1的正方形网格,已知某质点从
出发,只能沿着网格线走,每次走一格,且每次向右走的概率为
,向上走的概率为
,向左走的概率为
,向下走的概率为
,且每一步之间相互独立.若要求质点按最短路径从
到达
,则可能的不同路径有__________ 条(用数字作答);设按最短路径从
到达
的概率记为
,则当
取得最大值的时候
的取值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21198c85acf9672fafcfaa094de88342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40b29d292eaa8743e4f534d4c85e999c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a0be4eebc5d70c51f72f28dbfc11e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a0be4eebc5d70c51f72f28dbfc11e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
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3 . 圆上有5个点,过每3个点画一个圆内接三角形,则一共可以画出______ 个圆内接三角形;请编写一个排列数的问题,其答案为
,这个问题可以是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf27fcb6f5bd1bb02754526649b3bce2.png)
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4 . 自由落体运动中,物体下落的距离
(单位:米)与时间
(单位:秒)近似满足函数关系
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68220cd392b4587669ac2367a54eec33.png)
______ ,其实际意义为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90fa7bb0718e360e66e91a78f10e9b4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68220cd392b4587669ac2367a54eec33.png)
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解题方法
5 . 已知函数
是偶函数,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
_________ ,函数
的单调递增区间为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ad3cd09715e2bd73d6d1f828dfaa6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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解题方法
6 . 要做一个长方体带盖的箱子,其体积为
,底面长方形长与宽的比为
,则当它的长为_______ 时,可使其表面积最小,最小表面积为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976f9e0944eb38d7a73ed079c8fb6276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84783b6ba0f36789519816101a437f46.png)
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7日内更新
|
15次组卷
|
2卷引用:甘肃省定西市临洮县第二中学2023-2024学年高二下学期第一次月考数学试题
7 . 已知随机变量
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6cd8f25f8683cbaf235f8275b0e87a1.png)
__________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62dd66ffbcad36a5451cd1c61b44b760.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c646e0cbc38ccf348554456d4792e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6cd8f25f8683cbaf235f8275b0e87a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62dd66ffbcad36a5451cd1c61b44b760.png)
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8 . 一个袋子中装有2个红球和3个白球,假设每个球被摸到的可能性是相等的.从袋子中摸出2个球,设拿出白球的个数为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284341eb43bbc1609922796f7f570bc6.png)
_______ ;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d419c30ff40e9b368a3f151f639dac8f.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284341eb43bbc1609922796f7f570bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d419c30ff40e9b368a3f151f639dac8f.png)
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9 . 设随机变量
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bbae883ac71d106ea17f6c9de1092a7.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/631429c4c924638d9f6688ecda1094fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f72e21fb676122148ea985159a007358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bbae883ac71d106ea17f6c9de1092a7.png)
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2024-06-11更新
|
420次组卷
|
4卷引用:内蒙古名校联盟2023-2024学年高二下学期教学质量检测数学试题
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10 . 如图,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2abcd0ebb5c203e82cee03c334b26f2.png)
_________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c5a435ee3dd6c60a296e29b5aeb8f7.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2abcd0ebb5c203e82cee03c334b26f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c5a435ee3dd6c60a296e29b5aeb8f7.png)
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