真题
1 . 某校举办科学竞技比赛,有
3种题库,
题库有5000道题,
题库有4000道题,
题库有3000道题.小申已完成所有题,他
题库的正确率是0.92,
题库的正确率是0.86,
题库的正确率是0.72.现他从所有的题中随机选一题,正确率是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.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/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/c5db41a1f31d6baee7c69990811edb9f.png)
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真题
2 . 无穷等比数列
满足首项
,记
,若对任意正整数
集合
是闭区间,则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b67857a043caf87b55d38401d0d9062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d59e4e49e9b0b2493f18b41e260da5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d72f2cbabcb955a433e99bf0ee8ec020.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
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3 . 已知点B在点C正北方向,点D在点C的正东方向,
,存在点A满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451edc75de74313e53f5d636ac930848.png)
______ (精确到0.1度)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d381171dbde5c1ff4d8a09c178ab6f4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451edc75de74313e53f5d636ac930848.png)
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真题
解题方法
4 . 在
的二项展开式中,若各项系数和为32,则
项的系数为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b10e6c97137377c84146e48066a967.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a89e3c30f6e4d4c5db4378b05d987.png)
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真题
解题方法
5 . 已知
,且
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48e533b8b204982c7d42001a20b9548a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d76ee2e81f447f84a3e0b39c0388ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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真题
解题方法
6 . 已知抛物线
上有一点
到准线的距离为9,那么点
到
轴的距离为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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7 . 已知
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72253d846d8750db2bf695df99c53f3e.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56382fc7587c5570de7131665ff113b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72253d846d8750db2bf695df99c53f3e.png)
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真题
解题方法
8 . 已知
,
,且
是奇函数,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8066c2d6115e3ede16f0bfa2f42f4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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真题
9 . 已知
则不等式
的解集为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbce12f6911dacf78262ba950c0be55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5e1bcced697608aa2a6c6afcc181da7.png)
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真题
10 . 设全集
,集合
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2143cff1201a49034668264e48d1e17.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa4f59a3fd052f229e79e5aefa517913.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/141bca64b2f409a93f2a7a9d5a32d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2143cff1201a49034668264e48d1e17.png)
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