祖暅原理:夹在两个平行平面之间的两个几何体,被平行于这两个平面的任意平面所截,如果截得的两个截面的面积总相等,那么这两个几何体的体积相等.现有一个圆柱和一个长方体,它们的底面积相等,高也相等,若长方体的底面周长为8,圆柱的体积为
,根据祖暅原理,可得圆柱的高
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95345846d2dd4dfa042a9093c62a8b82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2017-08-17 19:11:24
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【知识点】 基本不等式求和的最小值解读
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适中
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【推荐1】已知
,
且
,则
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
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A.3 | B.4 | C.5 | D.6 |
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单选题
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适中
(0.65)
【推荐2】给出下列命题:①若
,
,则
;②若
,
,则
;③若
,则
;④当
时,
的最小值为
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A.0个 | B.1个 | C.2个 | D.3个 |
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