1 . 已知函数
,则
的值为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54c36520e5715681c64bf7a4bd31a176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/383acb6637f314601906b2b617c823bc.png)
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解题方法
2 . 已知平面向量
,
,
不共线,且两两所成角相等,若
,
,
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e7bf0d709033bd16591a75a514c21c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4acc71d9fbe05cb8cb98e0f6cf19a474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3be362dec96173f246ff747264007817.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38fac4f178f5c15ce56117b1bc855e8c.png)
您最近一年使用:0次
3 . 已知
是钝角三角形,角
的对边依次是
,且
,则边
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2293e25112b028c10edbf063146ecb3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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4 . 已知
的面积为4,下图是
的直观图,已知
,
轴,过
作
轴于
,则
的长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac39f40f5d82bfb09d9dc5036fd4c531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56fa5cea6f5d8e2a8a898822deb09e4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2653bcab817704ebe955db23485fd34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cfad1ba71a78d8f415335cde2f8c52.png)
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5 . 将4个不同的小球放入3个不同的盒子,每个盒子非空,则不同的放法有 _______ 种.
您最近一年使用:0次
6 . 若二项式
的展开式中
的系数是160,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcb0f5bafbb21f7c10258bf63738ffd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d800f03de80068a1172beac3a2c75587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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7 . 已知直线
:
.若点
在直线
上,则数列
的前n项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e212cdbfba6610bc55df2c1a737407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4976cb432a52c2316bc7dad303474c0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
您最近一年使用:0次
8 .
的展开式中
的系数为________ .(用数字作答)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d34f5f2120610a74547e21a0d82ef61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d800f03de80068a1172beac3a2c75587.png)
您最近一年使用:0次
9 . 如图,
,点A,B为射线OP上两动点,且
,若射线OQ上恰有一个点C,使得
,则此时OA的长度为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98cdc1204d3b8b3f5bea86ee5dd41744.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/269c684310d0f7b5b9bf0a291e7ee748.png)
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解题方法
10 . 已知
,且
,则
的最小值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a414d2844f3121845300ab9e84514c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adf913c92060a7bad4de1ee8c04d011e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4af3f72a7326aa54575b3236c4bf7be9.png)
您最近一年使用:0次