解题方法
1 . 如图,二次函数
的图象交
轴于
,
,交
轴于
,过
,
作直线.
(2)若点
是抛物线上的动点,点
是直线
上的动点,请判断是否存在以
、
、
、
为顶点的四边形为平行四边形?若存在,请求出点
的坐标;若不存在,请说明理由;
(3)在
轴右侧的点
在二次函数图象上,以
为圆心的圆与直线
相切,切点为
.且
(点
与点
对应),求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d57173ef4cd72eb270686875dfd623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852b303689c31189cd47bb4a3220f9fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9d6e498b0c1d1cedb86fe548f9fe79a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e82d53a8d2d7d3aa4c885e48fc6f3651.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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2 . 已知二次函数
满足
,
,
,
.
(1)求
的解析式;
(2)求证:
时,
;
(3)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4090560bb61e7728d9a0ae530e86cbd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/492269c463a2dd4cde7abbaac3e4a64d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46305fedfb17a208a8b4cab7ebceddfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2150b0c0926d641eefb3a84716190eb4.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16600d1f237ab3692764bb9fa6d83874.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae949345f4c432c3046a632f08bc60eb.png)
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名校
3 . 已知函数
(
,
).
(1)若函数
的图象与直线
均无公共点,求证:
;
(2)若
,
时,对于给定的负数
,有一个最大的正数
,使
时,都有
,求
为何值时
最大?并求
的最大值;
(3)若
,且
,又
时,恒有
,求
的解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce086037087f58409a28b4885979fd77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c0e9d1ad9561d693958756ee8398218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d3051f43ac48c0a730a791b8a93ad37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abffa1d225ca1e8bd2d15ab6d3ad9a50.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3320a13248a3a1208ff6ee85c9d26f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9439d9d9bc4f93dce4b94d1e33e06bec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/760f804646698060703c5458ff5637c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/044934f7dbd6847a30f13a34c9bb4e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efdb19e1863e40b863519bca9edcdf33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/760f804646698060703c5458ff5637c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/760f804646698060703c5458ff5637c7.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77cdb8806a697e8e5480fad9c380baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fdf1eec5487c094e8d38cbc77b91604.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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名校
4 . 已知函数
的图像过点
,且对任意的
都有不等式
成立.若函数
有三个不同的零点,则实数
的取值范围是__________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60a35277c37144276ead40bb74a51481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1557cec64ffb037fb124dc278289fa10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/064be53d3238d39957f13e10fabc392d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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5 . 已知函数
满足
,对于任意
都有
,且
,令
.
(1)求函数
的表达式;
(2)函数
在区间
上有两个零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/537f1dac6eb903b25b6aad4718565339.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104375baf5cef5eb92cfc7cf13b80193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0be07495dbc744e1ecabac66f748218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b65b04a6970ce5c954bbe8bd3d2c331c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a0b9f50dc6837cc7cee94590298e9a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03cc637e812ada4d4994b9c1713e9ea5.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1242ec96ac54e2fd418988d5190a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5fffd330dd6b9241659d790bd2a7fb2.png)
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6 . 已知二次函数
的图象过点
.
(1)若函数
在
上的最大值为1,求
的最大值;
(2)若对任意的
,存在
,使得
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df7595910401481e097d0ae0ac55b101.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5432187d1c042787433b7633292d00fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b2c273a7375333321d80a464a54c81a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83ad4ece23fd62a94210c321c7e8521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00575ab4b320a9b8b1f4ac1ef5994c6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c6ce02259a85ea191541f4a708738f1.png)
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2012·山东·二模
7 . 已知二次函数
,满足:对任意实数
,都有
,且当
时,有
成立,又
,则
为
![](https://img.xkw.com/dksih/QBM/2012/6/23/1570895577505792/1570895582830592/STEM/6d251f724030419ea549299bf8c443d1.png)
![](https://img.xkw.com/dksih/QBM/2012/6/23/1570895577505792/1570895582830592/STEM/3de7c9c5392147e1aa7c4e291782a227.png)
![](https://img.xkw.com/dksih/QBM/2012/6/23/1570895577505792/1570895582830592/STEM/df7d8cb034c642838b2c003ddc68037a.png)
![](https://img.xkw.com/dksih/QBM/2012/6/23/1570895577505792/1570895582830592/STEM/4819fd163c1f4cc1ae11f03fd86dd87b.png)
![](https://img.xkw.com/dksih/QBM/2012/6/23/1570895577505792/1570895582830592/STEM/c5f7d55dd0804ba6905e9a35b912d0c1.png)
![](https://img.xkw.com/dksih/QBM/2012/6/23/1570895577505792/1570895582830592/STEM/1baa1614b0834077bc20bbb33e487539.png)
![](https://img.xkw.com/dksih/QBM/2012/6/23/1570895577505792/1570895582830592/STEM/3f2c200571be49199c9b8648527beab6.png)
A.1 | B.![]() | C.2 | D.0 |
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9-10高三·湖南湘潭·阶段练习
名校
解题方法
8 . 已知二次函数
对
都满足
且
,设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/079f277788b447aabb0b527020dc20a4.png)
(
,
).
(1)求
的表达式;
(2)若
,使
成立,求实数
的取值范围;
(3)设
,
,求证:对于
,恒有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad5fe274cfc8da2dacfb65801f344ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb38ca84b4eadbe4eaa09bb5c778d912.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1feffb0bb2658090edd0b2f9f2721fc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/079f277788b447aabb0b527020dc20a4.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e72f6b2ef3329828cb8fc873eeba7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5bf7d03f075e1c0a67d02a56ddd6611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc9ede2e55724383dd1093fc7fcdb59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86aada6c0797463dd75408a0ad45c43e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e07a024c9ae1e811ea066430c02fd62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd1b5a2a71ae12061e768a1814f536a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/950e0e6b300b63f5424deaa89734811f.png)
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2011·上海静安·一模
9 . 设二次函数
,对任意实数
,有
恒成立;数列
满足
.
(1)求函数
的解析式和值域;
(2)试写出一个区间
,使得当
时,数列
在这个区间上是递增数列,
并说明理由;
(3)已知
,是否存在非零整数
,使得对任意
,都有
恒成立,若存在,求之;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ccc267e57f4ddf3ff7eebddb9506de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c0bd88ad30e02ee640eab5152d7a31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cfb19f0c37a72b33083ae9319f11a74.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)试写出一个区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30277e0be448b4955903e81e8795e45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd7f3da15610918720feb933c72053c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
并说明理由;
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14835bf3f00139ccec0694d0924db795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8e6c05c27ebf006a73c6ead9ed3e1f2.png)
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