名校
解题方法
1 . 任取一个正整数,若是奇数,就将该数乘3再加上1;若是偶数,就将该数除以2.反复进行上述两种运算,经过有限次步骤后,必进入循环圈
.这就是数学史上著名的“冰雹猜想”(又称“角谷猜想”).如取正整数
,根据上述运算法则得出
,共需经过8个步骤变成1(简称为8步“雹程”).现给出冰雹猜想的递推关系如下:已知数列
满足:
(
为正整数),
当
时,
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a16f78ce0dab1ac8fa6abbd70f2b008.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3967d620e2fef3ecc724c66e29f68a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a73700b5135fc6a9c2d923a27a4c9b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999ac8c1ef39251e07a7fc54cbf7e26e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d4914df4e75585d5ff7709d64a23611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a3cc8c48bf54ec8252e5dce6867754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59097ad7c8f3fcff871ad48933d30498.png)
A.170 | B.168 | C.130 | D.172 |
您最近一年使用:0次
2024-01-12更新
|
934次组卷
|
4卷引用:天津市和平区耀华中学2024届高三下学期寒假验收考数学试卷
2 . 已知
:
,
:
,则
是
的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4944f3d8e3f6ccf6c775d7e6ff6e23a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5fdec18642892e189c93a15b0d91cee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
A.充要条件 | B.充分不必要条件 |
C.必要不充分条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
3 . 设函数
.若
,且
的最小正周期大于
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a92bdcbe08ea0df872633fe314e143ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be8cc924e6fa74bbeebc219e166c8495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e2d7c958e99bcd9d7f251c19ee3544.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
名校
4 . “
”是“
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d217c7b12e12e5fb67472452518859ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d1db8e0dc586a6124e582dd8a4cd46.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
2024-01-08更新
|
744次组卷
|
3卷引用:天津市南开区2024届高三上学期阶段性质量监测数学试题(二)
天津市南开区2024届高三上学期阶段性质量监测数学试题(二)广东省深圳市高级中学2023-2024学年高一上学期期末数学试题(已下线)专题05 预备知识五:全称量词与存在量词-2024年初升高数学无忧衔接(通用版)
解题方法
5 . 已知复数
,若
是实数,则实数
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481cca25b32f209e0e4fc9e3e99629e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe615164ed2995bdeea0f5b0ba94231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解题方法
6 . 设椭圆
经过点
,且其左焦点坐标为
.
(1)求椭圆的方程;
(2)对角线互相垂直的四边形
的四个顶点都在
上,且两条对角线均过
的右焦点,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac5b4d0583e8b68caf2125d0b4ce6a2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
(1)求椭圆的方程;
(2)对角线互相垂直的四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c761dad84bd29109dc0ffc31b9cbbd46.png)
您最近一年使用:0次
2024-01-08更新
|
1215次组卷
|
5卷引用:天津市南开区2024届高三上学期阶段性质量监测数学试题(二)
天津市南开区2024届高三上学期阶段性质量监测数学试题(二)(已下线)每日一题 第25题 最值问题 减元降次(高三)(已下线)第二套 艺体生新高考新结构全真模拟2(已下线)模块七 圆锥曲线(测试)云南省昆明市云南衡水实验中学西山学校2023-2024学年高二下学期质量检测数学试卷(一)
7 . 在
中,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/670d0ffd69d8e66678535ca949dffe42.png)
__________ ;若
为
所在平面内的动点,且
,则
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8089c24ed8d770550e7cb005aa167876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/670d0ffd69d8e66678535ca949dffe42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0d33fcb1735e7d0b40c370cf843de0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59880e470359d8e9faf6ae5ce155cf2a.png)
您最近一年使用:0次
解题方法
8 . 设
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13af7857a252c0fae56035a9f0986be2.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
解题方法
9 . 已知正项等比数列
满足
,数列
的前
项和为
,当
时,
.
(1)求
的通项公式:
(2)证明
是等差数列,并求
;
(3)设数列
的前
项和为
,若
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202fe13ed24d989245057c631ba05c0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f1452d00da2d63ea1a82534d7897e40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b818b8c1871e5ade9c53da4a6ec9139.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8050391385b496e9c059201e4f12600a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(3)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d8d6c01ae94ee8c91c483e7a672e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91c5913636436e51792dd4c956960993.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2024-01-08更新
|
1151次组卷
|
3卷引用:天津市南开区2024届高三上学期阶段性质量监测数学试题(二)
10 . 设甲乘汽车、动车前往某目的地的概率分别为
,汽车和动车正点到达目的地的概率分别为
,则甲正点到达目的地的概率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4229be4f19bef1f0bc1f176349e09e85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9ded70d6669e8707838b9df1acbee9c.png)
您最近一年使用:0次