1 . 如图,将一副三角板拼成平面四边形,将等腰直角
沿
向上翻折,得三棱锥
.设
,点
分别为棱
的中点,
为线段
上的动点.下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2013303974d530fce9a9930938f4c2b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
A.在翻折过程中存在某个位置,使![]() |
B.当![]() ![]() ![]() ![]() |
C.在翻折过程中,三棱锥![]() |
D.当![]() ![]() ![]() |
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名校
解题方法
2 . 设各项均为正数的等比数列
的前
项和
,若
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4350dddc7cca2eac5f2671c6ea8370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca1290ebeed25074eaa854bfeadba18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614306cc3f34bdee4d5d885b79667645.png)
A.![]() | B.![]() | C.15 | D.31 |
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3 . 已知数列
,记集合
.
(1)对于数列
,写出集合
;
(2)若
,是否存在
,使得
?若存在,求出一组符合条件的
,若不存在,说明理由;
(3)若
,把集合
中的元素从小到大排列,得到的新数列为
,若
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3458fc91e73c89b7f5f7c1f474c4cd03.png)
(1)对于数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18af898259691fdc8b0a1c08eb4eb05b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9260f8989cfd0ffca5a49ffbc0668f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f091f3424a0951bc94faa30c375f607d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b07ef9ec9ea51f0a0d16e39116dfbd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c639c7e5f1e7e7ee5d5ee2f30b155bb0.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a694ee63925fe653457f577063d6d7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e75ce7f5119e9c9c2fa8ee315c1c2ce1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25efaf1a568553b27434c71ddb447c9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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4 . 已知
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1587d84c7c100874a42595e49df3decb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2bb6a8d969fed4e5f8d0198a617a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
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5 . 函数
,若关于
的不等式
有且仅有四个整数解,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cad89a93eb64a1042897ffd26938ae7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9fc22e3670c88df52295930874b5c7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 甲、乙、丙三人进行一种传球游戏:当球在甲手中时,甲将球保留(也记为一次传球)的概率为
,否则甲将球传给乙;当球在乙手中时,乙将球传给甲的概率为
,否则乙将球传给丙;当球在丙手中时,丙将球传给甲的概率为
,否则丙将球传给乙.初始时,球在甲手中.
(1)设传球三次后,球在甲手中的次数为
,求随机变量
的分布列和数学期望;
(2)传
次球后
,记球在乙手中的概率为
,求数列
的通项公式;
(3)在第(2)问的条件下,设
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
(1)设传球三次后,球在甲手中的次数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
(2)传
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89ba85f74cda4ddd621278e558bc036f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c5a325806df1a1c3e7ce609fe99085f.png)
(3)在第(2)问的条件下,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c5480895acd403646b100881934402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47574401ddb0aae1b96ca138b773a788.png)
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解题方法
7 . 已知
是两条不同的直线,
、
是两个不重合的平面,给出下列命题:
①若
,
,
,则
;
②若
,
,
,则
;
③
是两条异面直线,若
,
,
,
,则
.
上面的命题中,真命题的序号是________ .(写出所有真命题的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202af51f5ebe87ec0017f439a6ad7fbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/539a38ada26356d73024fb8533449c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209323a7a4d015f7e570ec578c1731f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0205571fa39f343ee5749b78d466bf0.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06f45af0c9a458165ed9773cd78c76e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb088614157a85ed7cb11802e49a2981.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f1d24c79c03432210b43d6bb0269236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202af51f5ebe87ec0017f439a6ad7fbf.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af680499446f4f2cd3c3d6cb37905efa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb088614157a85ed7cb11802e49a2981.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7862c0ab0d7196330c5538b8720facd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f1d24c79c03432210b43d6bb0269236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202af51f5ebe87ec0017f439a6ad7fbf.png)
上面的命题中,真命题的序号是
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解题方法
8 . 已知正方形ABCD的顶点均在表面积为
的球O的球面上,则当四棱锥
的体积取得最大值时,点O到平面ABCD的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20b3a91ccf6028608cd03df7072f6536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a5faf3cbb633fc4294c8ce703c64c3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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今日更新
|
4次组卷
|
2卷引用:陕西省铜川市王益中学2024届高三下学期高考猜题信息卷(二)文科数学试题
9 . 将函数
的图象向左平移
个单位长度后得到函数
的图象,再把函数
的图象上每一点的横坐标缩小到原来的一半(纵坐标保持不变),得到函数
的图象,则函数
的图象的一条对称轴的方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53df713bc1c521c599aca9f6f38f4454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcf8193aaa40bcd8a82e71b49a673256.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f786a5701dc1a8a015e8843c3360151b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f786a5701dc1a8a015e8843c3360151b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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