解题方法
1 . 已知向量
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e90af409c8f261268560c619d69d15fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf21fef3026cfe445a855c94cab5c84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
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解题方法
2 . 已知数列
满足
,其前
项和为
,若
,且
,设数列
的前
项和为
,则满足
的
的最小值是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/578e5270e7d7c7578561d73cdb470788.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd3b679b6bc2a6f6d59213236fa001a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/012d72469c08a7ca00e5cb12ef614139.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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解题方法
3 . 已知
为单位向量,若
的夹角为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dff34c0b8e54449b357318b59f92d59.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dff34c0b8e54449b357318b59f92d59.png)
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4 . 已知函数
,定义域为
,则
的值域为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f77a5a54018ea5170149e5ecb999be3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d6693a5d776dda2bb64ea9256b8da1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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5 . 命题“若
,则
或
”的逆否命题为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b33cf673823c15eba0e1e6b47dd5085.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
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解题方法
6 . 已知平面向量
满足
,若
,则
与
所成角的余弦值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e12e95f703ad30ab9a3d38376830989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/871335120cc9a7712a9cd34748c55579.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0078f9185c0bff869193990408380bad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed492f7b29166ba5c1f0023b05a439c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02e3921e92ab4a807bfb6e793240d879.png)
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解题方法
7 . 已知实数
满足约束条件
,则
的最小值是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3904b2b649d18c609673866b6d177ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4489516aca67a6afe53fac2f1477f76.png)
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解题方法
8 . 将四棱锥
沿棱展开为平面图形,如图所示.若
,
,
,
,
,
,则在展开图中,
两点之间的距离![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff9214112843303e45a4d9dc20507ed1.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e07a099bf87e471b94bc97f0249daf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074a5b4d376ae0d7648d97b79be0b65d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0d829c51c819076d094facd9dffe2c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4b7efcc776e3479d01484cd468c6894.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fa5088fedf996af3d7c50a39bdaae73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be94b5ac27724cd0e43541759203784e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0698ef3a8f862a82245d97691eba628f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff9214112843303e45a4d9dc20507ed1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/c6cb2c6f-7ab3-445d-8449-1c3850cd7f7f.png?resizew=171)
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9 . 在平面直角坐标系
中,过抛物线
的焦点
作一条直线
与交于
两点,过
分别向抛物线
的准线引垂线,垂足分别为
,若
,则四边形
的面积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d8ab667240b9a7b131c284d2e49c747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8454989732716850cb57ca15f8ef596.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eefc0140c19ef77ff04d16456d881b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
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解题方法
10 . 在
中,
,
,
,若
,则
边中线
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df81cda12d7601d58b1d9c7c180c4d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c884a45b56bc34d79273b067c1520b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fffa3d9c32da53b0ea0c338012ea20c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b21f51a8fe0d9f826aa1a5d0017b908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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