1 . 在正四棱锥
中,M在棱
上且满足
.过
作截面将此四棱锥分成上,下两部分,记上,下两部分的体积分别为
,
,则
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7800c1210c77d924ed89c5943b896336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe025dc532521cc1919d57fa97a1f66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81f4784453d5db30fbb7df3ffa85be30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea87fc8705bde72f090cc253f89b0e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca18b0da772ccb7a1414ebe9e9745d7.png)
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2 . 已知关于x的不等式
对任意
恒成立,则实数a的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b30ba897503f5e37d7005774c0c225d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/103ec0d91228a7a0c07a0e2f7bf2b0b6.png)
您最近一年使用:0次
3 . 已知点
,抛物线
,不过点P的直线l交抛物线C于不同的两点A,B.记直线
,
的斜率分别为
,
,且满足
,则直线l的斜率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d7e1fef7c52d918f9c1c26306fc3e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53c2d5ba20426f126eaba9d9cc895e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2562424a83aae7e4b3f8adf90307961a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03b58edb637c5dfa03794f3952de9d83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77ca7188816bab0bbf1543680108b71d.png)
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4 . 已知锐角
的内角A,B,C的对边分别为a,b,c,且
,则角A的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ff214d99784c6b23b7784bdaf3ed37a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad10dcd98c90c20c5acbfe7d83f54d89.png)
您最近一年使用:0次
5 . 已知平面向量
,
,
满足
,且
,则
最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/524594bf0942ed86f56fc1eee120a81a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e275e2f458db459e28f43062ab8d2b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9885da9bc997ce0763edcb000b85a686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0055cbdfb047c8bd2791fefd81eb0d0d.png)
您最近一年使用:0次
6 . 已知函数
在
处的切线方程为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55850c68bc526463bd2a430607ac1219.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11aac6d755589c691634999c0415948d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97282a21da129516474b783565823c84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8691c1af30fe93095815d3d9abcebbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55850c68bc526463bd2a430607ac1219.png)
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7 . 已知
,其中a,
,则n的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6be80de677aadad3c15f8ab9d77acf0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c498307848129bbd89b5b86f511f0f.png)
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8 . 已知集合
,若集合A中恰有9个正整数,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22d7c214d9685da7be80319ed80d8df.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4a28163ffc27c4685b444c454eded04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22d7c214d9685da7be80319ed80d8df.png)
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9 . 已知复数
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d05b59b1d2ab28856d187816f4fd13d.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac5951b39a2e05bf4ff01aaa111a454b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d05b59b1d2ab28856d187816f4fd13d.png)
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10 . 三角形各边均为整数,且最大边长为5的所有三角形个数为______ .
您最近一年使用:0次