名校
1 . 已知函数
的值域为
,函数
,
的值域为
.
(Ⅰ)求集合
和集合
;
(Ⅱ)若对任意的实数
,都存在
,使得
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619c742d2634e792d4670fe155fd0862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85d4f9206c66830b56dc1057e8194c4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6204b1b9ca61cc22e6e9df62f70737d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(Ⅰ)求集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(Ⅱ)若对任意的实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2600bac8e141ddae4c3cab8646a39eca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ba8542fbe02e78cf3948c9abea9855.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ad4a9b46f6db4419365884302c56152.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2 . 在正三棱锥
中,点
都在球
的球面上,
两两互相垂直,且球心
到底面
的距离为
,则球
的表面积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90a0889f0f80987c260cce05be4c84b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19bb1063e139610045f3bca5ca0b2766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186354626d5a1d13b88dfb4df916947b.png)
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3 . 某食品的保鲜时间
(单位:小时)与储藏温度
(单位:
)满足函数关系
(
为自然对数的底数,
为常数).已知该食品在0
的保鲜时间是192小时,在33
的保鲜时间是24小时.
(1)求
的值;
(2)求该食品在11
和22
的保鲜时间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/901def3ac5aedb8998458f292ddcea6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/985b8f11b56ddf37d46b8175c5cb3b26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef6f7d6268046de2f13a6c876cfc3e2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6a067efe04a0dd42e6ab88cd6b73f5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/901def3ac5aedb8998458f292ddcea6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/901def3ac5aedb8998458f292ddcea6e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)求该食品在11
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/901def3ac5aedb8998458f292ddcea6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/901def3ac5aedb8998458f292ddcea6e.png)
您最近一年使用:0次
4 . 设函数
,若对任意
,都存在
,使
,则实数
的取值范围为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac61e696eac5afbd2528b01997886462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec80634a6e2b2c85f845fa368b3a5969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ba8542fbe02e78cf3948c9abea9855.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eca5c282908fef3f0481e376f42c490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-02-17更新
|
83次组卷
|
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