名校
解题方法
1 . 我们知道,一个一元一次方程最多有一个根,一个一元二次方程最多有两个根,这些都是代数基本定理的简单表示,代数基本定理可以表述为:一元n次多项式方程最多有
个不同的根.由代数基本定理可以得到如下推论:若一个一元
次方程有不少于
个不同的根,则必有各项的系数均为0.已知函数
,函数
的图象上有四个不同的点A、B、C、D.利用代数基本定理及其推理回答下列问题:
(1)解关于x的方程
;
(2)是否存在实数
,使得关于
的方程
有三个以上不同的解,若存在,求出
的值,若不存在,请说明理由;
(3)若
按逆时针方向顺次构成菱形,设
,求代数式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa8a18548e00a131abe2eca8c4c815c2.png)
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0876215b2fd463d151523cd3c6b447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7bc57a9ac3f82c3b8af4fe78e5c861b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(1)解关于x的方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b070bfc31cef4c001541af54d3c36cd3.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb2158cfb945452be603a745510df299.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0877194ab8760f54c35527177b03ff93.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0b032796d46540441098204aa82c12a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa8a18548e00a131abe2eca8c4c815c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c004d926a934cced9bc523a8ecde1df1.png)
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2 . 已知向量
,若函数
的最小正周期为
.
(1)求
的解析式;
(2)若关于
的方程
在
有实数解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929b9c8a77f00c85d276d34903c8aab4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761cd74c560bac80754753ad66687f1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ff8daef26182f44d1645a1066db7bff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7faee6c7c8bd4625d8f01c29b1a44cdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2020-05-15更新
|
834次组卷
|
2卷引用:安徽省六安市舒城中学2021-2022学年高二上学期第一次月考数学试题
16-17高二上·上海浦东新·阶段练习
名校
3 . 在平行四边形
中,过点C的直线与线段
、
分别相交于点M、N,若
,
;
(1)求y关于x的函数解析式;
(2)定义函数
(
),点列
(
,
)在函数
的图像上,且数列
是以1为首项,0.5为公比的等比数列,O为原点,令
,是否存在点
,使得
?若存在,求出Q点的坐标,若不存在,说明理由;
(3)设函数
为
上的偶函数,当
时,
,又函数
的图像关于直线
对称,当方程
在
(
)上有两个不同的实数解时,求实数a的取值范围;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a40ee38c74eeab2ab1d3760d275b59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/118f9aa8deddeed538d600bac65ee1d8.png)
(1)求y关于x的函数解析式;
(2)定义函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d16745051a2be22b6f1b9f2937ad5c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5c837522a811402efb9762210c5362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a47e32fc61120ab08fe1fc65dc23bd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12b0e3b00fe47801afb53ec56706c21a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f5a90aeba435af22d6bcdb7b91650b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91587145b08f345881ad7ad1ed5de2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e45596de995ef022f0bbe9818d8ba6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/832f15b6121d2d3001905865109d5bef.png)
(3)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e593828316139a54019e352dec883f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7dbb416ec1ff1984a724a4f48bf692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c831aeeb8b6a466f06fffcf49b91a6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e593828316139a54019e352dec883f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82bab8c444ffe566c8bb0f9ab8c18a36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/730368dee72935acc485d2a90bb5338e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff2aa68223dfc02f39d7d10fa005387.png)
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名校
4 . 在平行四边形
中,过点
的直线与线段
分别相交于点
,若
.
(1)求
关于
的函数解析式;
(2)定义函数
,点列
在函数
的图像上,且数列
是以1为首项,
为公比的等比数列,
为原点,令
,是否存在点
,使得
?若存在,求出
点的坐标,若不存在,说明理由.
(3)设函数
为
上的偶函数,当
时,
函数
的图像关于直线
对称,当方程
在
上有两个不同的实数解时,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f47ddc7c9fb41942160e3cafcf756776.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad18914e0d0268879e8dc2847f7ad32e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)定义函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b3c02562c565abd71fe9376f99e698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d585fe2ecc66826dfdf524c30562efe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f5a90aeba435af22d6bcdb7b91650b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec818fc0754296163206e1e8870f9e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4feb3e33d79703a010ab52dd9baf2032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e45596de995ef022f0bbe9818d8ba6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29952686fdd81176939c63fb78408b12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(3)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e593828316139a54019e352dec883f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7dbb416ec1ff1984a724a4f48bf692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aac68a6c5b6843b8807afcf6fc594d95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e593828316139a54019e352dec883f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82bab8c444ffe566c8bb0f9ab8c18a36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0f20601215fa5e37bdb73528170a66e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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5 . 已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2704c1c767d39d29718ad145e5d15d4.png)
(1)求函数
的最小正周期及单调递增区间.
(2)当
时,方程
有实数解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2704c1c767d39d29718ad145e5d15d4.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3202e14511fb886ef6f90699609c97af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ee2125e761b2ef9da51dc0f9a02dee6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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12-13高二下·福建泉州·期中
6 . 已知定义在区间
上的函数
的图象关于直线
对称,当
时,函数
,其图象如图所示.
![](https://img.xkw.com/dksih/QBM/2013/5/10/1571210464903168/1571210470400000/STEM/2375d990dc154cfc904a813b23965de4.png)
(Ⅰ)求函数
在
的表达式;
(Ⅱ)求方程
的解;
(Ⅲ)是否存在常数
的值,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7863e695698137039a1e73ec437fc2ad.png)
上恒成立;若存在,求出
的取值范围;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea5535a625f49d7d0ad3a981dc463637.png)
![](https://img.xkw.com/dksih/QBM/2013/5/10/1571210464903168/1571210470400000/STEM/d974b130da0b40d697be294f948d6515.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26718af84fe8d35608797711e21b2ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfde81fc270087e6ddd8c09c5ade26cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bed23ce3c25da404f800b1037d9d9142.png)
![](https://img.xkw.com/dksih/QBM/2013/5/10/1571210464903168/1571210470400000/STEM/2375d990dc154cfc904a813b23965de4.png)
(Ⅰ)求函数
![](https://img.xkw.com/dksih/QBM/2013/5/10/1571210464903168/1571210470400000/STEM/d974b130da0b40d697be294f948d6515.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/479242602cba99a8093240ddd4b50f33.png)
(Ⅱ)求方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1900ff6726a9f7e247e1813409a07f3e.png)
(Ⅲ)是否存在常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7863e695698137039a1e73ec437fc2ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb1ac0a730a136aec96f58bdc8bf510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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