1 . 数列
是首项为
,公比为m的无穷等比数列,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31463b348f21711420670df9d7d03a8.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b889efe020137b112bfafaa8e0becda4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8364a6ab3d52f1afc73e6edb55e7831c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31463b348f21711420670df9d7d03a8.png)
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解题方法
2 . 已知函数
令
.
(1)当
时, 求函数
在
处的切线方程;
(2)若
在
上为增函数, 求
的取值范围;
(3)当
为正数且
时,
的最小值为
, 求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f8baeb1834ab5bcc0be4dee17b05e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/784ff548b42fd0f785c5c272e6c8017a.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302337058242c7b78e3eb4ac7210b7ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5946299ed8f8c741a82c8d920e1e206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679353e656a54993c041ebd39ec7b31b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55bf860bcfd2f07925a6b34ed4fb1cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb4d0b8dc24e72bcbaa895948a27c17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5958a0a5d445af568285f1e8dac16005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b74eb8a7738402df52d4a97262b85ca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
3 . 设实数
.对任意给定的实数
,都有
.
(1)当
时,求
的值;
(2)若
是整数,且满足
成立,求
的值;
(3)当m=1时, 求
的二项展开式中系数最大的项是第几项.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0baedc4d7e690ab3f7d80d30ba0a9efe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b018c29b858933e37675637067517d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a86161bdbba4973d81789c22c351d885.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ced964780e3ef77088346889a8457f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ffccf6d92a926b3be8e1a6b6fe75faf.png)
(3)当m=1时, 求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9579921aed40d74915f69f6bacca253a.png)
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4 . 某分公司经销某种品牌产品,每件产品的成本为3元,并且每件产品需向总公司交a元(
)的管理费,预计当每件产品的售价为x元(
) 时,一年的销售量为
万件.
(1)求分公司一年的利润L (万元)与每件产品的售价x的函数关系式(并写出函数的定义域);
(2)当每件产品的售价为多少元时,分公司一年的利润L最大,并求出L的最大值Q(a).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3ddf7a77f9961af4c20f2468091754b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08bd9a99e29652b98d2196b1891a50e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a3430e015476e8f5ee190baa6ba2c5.png)
(1)求分公司一年的利润L (万元)与每件产品的售价x的函数关系式(并写出函数的定义域);
(2)当每件产品的售价为多少元时,分公司一年的利润L最大,并求出L的最大值Q(a).
您最近一年使用:0次
5 . 掷两颗骰子,观察掷得的点数.设事件A为:至少一个点数是奇数;事件B为:点数之和是偶数, 事件A的概率为P(A), 事件B的概率为P(B). 则P(A∩B)是下列哪个事件的概率( )
A.两个点数都是偶数 | B.至多有一个点数是偶数 |
C.两个点数都是奇数 | D.至多有一个点数是奇数 |
您最近一年使用:0次
6 . 已知函数
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0fb12a57c08f24b026b9f75116b9d27.png)
________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b1c079afd1b058adc67a50f48f3d466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0fb12a57c08f24b026b9f75116b9d27.png)
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7 . 现从甲乙口袋各摸出一个球,如果从甲口袋中摸出一个红球的概率是
,从乙口袋中摸出一个红球的概率是
,则摸出的两个球至少有1个红球的概率为_________ (请用分数表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb84f6fbac102ccf326b2223d69cb7cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eff998d034284391ca064755fa6bf1b.png)
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8 . 满足方程
的x的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0341142f7a255dd306c4645de015ba16.png)
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解题方法
9 . 已知
是底面边长为1的正四棱柱,
为
与
的交点.
与底面
所成角的大小为
,异面直线
与
所成角的大小为
,求证:
;
(2)若点C到平面
的距离为
,求正四棱柱
的表面积;
(3)若正四棱柱
的高为2,在矩形
内(不包含边界)存在点P,满足P到线段BC的距离与到线段
的距离相等,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48de102fadeee495637087066a2a6b01.png)
(2)若点C到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
(3)若正四棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcab96f97a5e202ba9220bac5280e4f3.png)
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解题方法
10 . 在正三棱柱
中,
,点P满足
,其中
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af0e44cb429eea46e7ee4320147192b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac6b545127bd51036a5a7b0d3cd5b320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee72261f6901e62dfd0ffe547406544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e2e01346f60857ff635bb766802e57.png)
A.当![]() ![]() |
B.当![]() ![]() |
C.当![]() ![]() |
D.当![]() ![]() ![]() |
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