已知点
,
为坐标原点.
(1)若
,求
的值;
(2)若实数
满足
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b0b48f87b1cf5d25b590c60fa3dfb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12119a418505ce8c190c575a6de38bff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a080cab44a7d3605430d67b207f9be.png)
(2)若实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ab8d9ec70b87c38a978f43d012eff0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ccb9e2ad02134176b62c4b4b9b6cd92.png)
更新时间:2017-07-25 17:22:58
|
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解答题-问答题
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适中
(0.65)
解题方法
【推荐1】在
中,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】已知
不平行,分别求满足下列各条件的实数m,n的值:
(1)
;
(2)向量
以
为基底的分解式为
,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64fa2fcefaf3d8868da0cb52877c5247.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86ab9132df37c9b37c1f79184a930f0.png)
(2)向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b817d7c430a4aea11b058f5c074e8769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98b8e2f2ca291c6c9f482cc527489c62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57d72bc8fe2f25dbc28313c6353a7cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a4f6078468b3cce92043832c187a34.png)
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解答题-问答题
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【推荐1】记
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,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7698b51bec3a5cb6ac3c20a055dc498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ff9fd5a2c3a2fbe0185d94d1ac4a5e.png)
(1)求C;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c30cd7b77f8f6f0b9286ba4a6103f10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解题方法
【推荐2】已知
、
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(2)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0411792b587ddd3e04440392f011c224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95d660852c5226ff65a21cfb36b8b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0411792b587ddd3e04440392f011c224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95d660852c5226ff65a21cfb36b8b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231b861d6d1f1d0b9f52b041cb40eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e47d753d546bc46ef3d08eb54c147c4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/901bb04207042bd616391a23dba2b873.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854e16eb319ee454088f5b527cf6c4d5.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
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解答题-问答题
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适中
(0.65)
解题方法
【推荐1】已知抛物线
的准线为
,直线
交
于
,
两点,过点
,
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,
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的面积为
,求实数
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(2)是否存在常数
,使得
成立?若存在,求出
的值,若不存在,请说明理由?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/303094682b317daea83be885d1c7ff4b.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
(1)若梯形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdcfe69b939fd1c271747fe9d37ccdf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427cc3ae2dab5580fcb93eba22246595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)是否存在常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d290bbda53ed0ac1dd967012324ee0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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【推荐2】在平面直角坐标系中,O为坐标原点,已知向量
=(-1,2),又点A(8,0),B(n,t),C(ksin θ,t)(0≤θ≤
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(1)若
⊥
,且|
|=
|
|,求向量
;
(2)若向量
与向量
共线,当k>4,且tsin θ取最大值4时,求
·
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fe2d802f2b37e7db198c5a3c1df9a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fe2d802f2b37e7db198c5a3c1df9a4.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b680f91c4a693cc9ab2c23f2e9114ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4407c0b2e5febf70f610bd00067f105.png)
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