解题方法
1 . 在某项投资过程中,本金为
,进行了
次投资后,资金为
,每次投资的比例均为x(投入资金与该次投入前资金比值),投资利润率为r(所得利润与当次投入资金的比值,盈利为正,亏损为负)的概率为P,在实际问题中会有多种盈利可能(设有n种可能),记利润率为
的概率为
(其中
),其中
,由大数定律可知,当N足够大时,利润率是
的次数为
.
(1)假设第1次投资后的利润率为
,投资后的资金记为
,求
与
的关系式;
(2)当N足够大时,证明:
(其中
);
(3)将该理论运用到非赢即输的游戏中,记赢了的概率为
,其利润率为
;输了的概率为
,其利润率为
,求
最大时x的值(用含有
的代数式表达,其中
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41d793c851a2f72f787913ba23e459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a22baa009d2d45f6a37332ec3363285.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/903d7f7559c216e2516b9886c8f96008.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e60c0d3a709196db0791a93ed0db409.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf99487d7860d017c0747ff966edfd77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad52924df9291d5d191d18e09374ee1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cdff4a44b674e8060072b7326549bf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e60c0d3a709196db0791a93ed0db409.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdbd2aa0b04224ad335d43a53d81ae16.png)
(1)假设第1次投资后的利润率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2858005b9ae89ae080d83dcc13cf8e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41d793c851a2f72f787913ba23e459c.png)
(2)当N足够大时,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f58c4f5f1d988a104655727aa501683c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd8f40e552f049c19252845917375c17.png)
(3)将该理论运用到非赢即输的游戏中,记赢了的概率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2858005b9ae89ae080d83dcc13cf8e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3e95410f3b4fcb0cba425b521d1f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5092000864ee720978d6d701c953a388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c5439464042af3cbd35cf65be156.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a89183e464e81e2c692ed239023ecd.png)
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2024高三·全国·专题练习
解题方法
2 . 环保部门为了研究某池塘里某种植物生长面积S(单位:
)与时间t(单位:月)之间的关系,通过观察建立了函数模型
,且
.已知第一个月该植物的生长面积为
,第三个月该植物的生长面积为
.
(1)求证:若
,则
;
(2)若该植物的生长面积达到100
以上,则至少要经过多少个月?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dddf656285f15a7ec64b2e9dae3619f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2effd58a392916df94cb2ec43d8909a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37fa1476cf3552b9ae91ef039b1c6c80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe7db4f9f44214756cbe864e82090c74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb472cf593af7c80b4e9e585de62c4fd.png)
(1)求证:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07609b6d024ee533cf145d2b73da128f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efaff0e8b40cff41c1c543d8acafdb7b.png)
(2)若该植物的生长面积达到100
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dddf656285f15a7ec64b2e9dae3619f.png)
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名校
解题方法
3 . 伯努利不等式又称贝努力不等式,由著名数学家伯努利发现并提出.伯努利不等式在证明数列极限、函数的单调性以及在其他不等式的证明等方面都有着极其广泛的应用.伯努利不等式的一种常见形式为:当
时,
,当且仅当
或
时取等号.
(1)假设某地区现有人口
万,且人口的年平均增长率为
,以此增长率为依据,试判断
年后该地区人口的估计值是否能超过
万?
(2)数学上常用
表示
,
,
,
的乘积,
.
①证明:
;
②数列
,
满足:
,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffb9a7b379a1c221a80a57ae335f5c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7aa7d0c68906937a6392606de445d68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
(1)假设某地区现有人口
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efba7147f5b9ced8bc4a72f0a9fb8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba01d85cd57bded85cf3302538084bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c18ea011a4bce91e9f27c828b05b34eb.png)
(2)数学上常用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cca374b4e6d3ebc183c5b21d4ea7220.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a841d8525dad99ea07cc0f7eeb96aaa.png)
①证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e548f475d3b31274ea78bc7e06013da.png)
②数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b80c1ed7b10ac7ca1cd81cdd39a8fcc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed2f1c445c8f1f9ab8055017beb6fdf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7395787456de0be7174732f0d2939cf0.png)
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名校
4 .
技术的价值和意义在自动驾驶、物联网等领域得到极大的体现.其数学原理之一是香农公式:
,其中:
(单位:
)是信道容量或者叫信道支持的最大速度,
单位;
)是信道的带宽,
单位:
)是平均信号功率,
(单位:
)是平均噪声功率,
叫做信噪比.
(1)根据香农公式,如果不改变带宽
,那么将信噪比
从1023提升到多少时,信道容量
能提升![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1078cd967972b58c8eb2783d8b7a41f5.png)
(2)已知信号功率
,证明:
;
(3)现有3个并行的信道
,它们的信号功率分别为
,这3个信道上已经有一些相同的噪声或者信号功率.根据(2)中结论,如果再有一小份信号功率,把它分配到哪个信道上能获得最大的信道容量?(只需写出结论)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47248d88a8876e1177cbd3ba43b11bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70215f90c7b8bd048aeab814ffcb1075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0594324ac79e120d87761d147159f93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53801bf39bf5de59f2853caeac6f8784.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72bc766cbead9ec6fb613abe669b0be2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14bfbd55ad2a343daee3194b30a4cca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca586d4c35ce52dec4b545cf13ee0721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca586d4c35ce52dec4b545cf13ee0721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/848c6dc59f47173493581489dde138df.png)
(1)根据香农公式,如果不改变带宽
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/848c6dc59f47173493581489dde138df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1078cd967972b58c8eb2783d8b7a41f5.png)
(2)已知信号功率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7d654dec2ae3a0f1dda3420b354d38b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0116640668a4da68b97f4f7809a95a7.png)
(3)现有3个并行的信道
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67b0ea548b200fd74a2412d13c00e077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e717353515a0c6f3423dd25b42509006.png)
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2023-03-16更新
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266次组卷
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6卷引用:福建省厦门市第一中学2023-2024学年高一上学期期末模拟数学试题
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