名校
1 . 已知集合
,若“
”是“
”的充要条件,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc0982d002a381b91be1f775a40d5ae.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8723077870d8ad10b44c2bb53e2b4124.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23af61cd402b3789af2401bde9cbefe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc0982d002a381b91be1f775a40d5ae.png)
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2 . 函数
的零点所在区间是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699b3f84d2e5beea2370a910cd0c6599.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 已知集合
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40373eeac089bf42d3a293c3ddd744f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 某林区的森林面积每年比上一年平均增长
,要增长到原来的
倍,需经过
年,则函数
的图象大致为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c1e9ce568e2be010e4bc7c9e9e1bed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afb80007983e5b99dcdeebf87d18ff4.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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5 . 已知集合
,若集合
满足
且
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfaf2133a57a1ba37929353a7e872b77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e544b1304a6bbc87283cf741f134cebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/503063d36255ecb333cec1f27ec69b63.png)
A.![]() | B.![]() |
C.集合![]() | D.集合![]() |
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6 . 已知对任意实数
,不等式
恒成立,则实数
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764136e484a1017041eda8df27d0e206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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7 . 已知函数
,则方程
所有的解构成的集合是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ff70e3829c5c9f9b181b5aec8b2d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5892d6acd7271a4e9fc427427ab85108.png)
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8 . 已知集合
的子集中含有3个元素的子集记为
.记
为集合
中的最小元素,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f254b378cfc6b6a60a32fd6ad670d2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60be7d1bf962492cfbc6b930599cf130.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a584b6ad5577ab3e2d22caf23e3c32b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51d3e8aa834a3d720620390ed8805fa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e967fb493fcf466618b30cdb4ef165f.png)
A.55 | B.70 | C.89 | D.630 |
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9 . 2021年雨水充沛,是一个丰收年.到了夏季,大量新鲜水果上市.现已知某品种苹果失去的新鲜度
与其采摘后的时间
(天)满足关系式:
.若采摘后5天,这种苹果失去的新鲜度为
,采摘后10天失去的新鲜度为
,那么采摘下来的这种苹果至少在多长时间后失去
的新鲜度?( )(已知
,结果四舍五入取整数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39b170443c26c44ffb68c9cfb17f0938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f762a1de162d8dca6dcd06a3107c3fe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b02d57cd524288750a6a7cbec64cd26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28555fa2f3a09261cb4e0305d390145.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8f5b560c5cea567a5e5c3462085b43.png)
A.17天 | B.18天 | C.27天 | D.28天 |
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解题方法
10 . 已知
是定义在区间
上的增函数,且
,如果
满足
,则
的取值范围为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58edd6b04c5692e26327f783aea357e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c7efbe2451f4f34eef70ea87beef671.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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