1 . 已知函数
是定义在
上的奇函数,且满足
,当
时,
,则当
时,
的最小值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d78dec1c1e00ec02d7bdaf76ef8901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54297d09c19f29d92463d21928998266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787c2e85b77a019736904b284d6e8017.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d44ac5cb478916f81ef2d42911258aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
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2019-11-11更新
|
489次组卷
|
3卷引用:四川省宜宾市叙州区第二中学校2020-2021学年高三上学期阶段一考试数学(理)试题
名校
2 . 已知等比数列
满足
,
,则
的前
项积
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ef35b21da4cd8130642539d8245f83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17cf962f8801d1a4845df3720f685e3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4739752c15deaaa389345380658f59be.png)
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2020-01-20更新
|
308次组卷
|
3卷引用:四川省成都市双流中学2021-2022学年高三上学期第一次阶段性检测数学(理)试题
名校
解题方法
3 . 秦九韶是我国南宋著名数学家,在他的著作《数书九章》中有已知三边求三角形面积的方法:“以小斜幂并大斜幂减中斜幂,余半之,自乘于上以小斜幂乘大斜幂减上,余四约之,为实一为从陽,开平方得积.”如果把以上这段文字写成公式就是
,其中
是
的内角
的对边为.若
,且
,则
面积
的最大值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3a16439a588c931f2ad5542386b680d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7098e7fdd9d6f543265b359a1f038d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02a9f2ad9509bff0ac4bb21deb66ae1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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2020-03-09更新
|
323次组卷
|
9卷引用:四川省宜宾市叙州区第二中学校2019-2020学年高一下学期期中考试数学试题
名校
4 . 已知平行四边形
的周长为
且
,则平行四边形
的面积的取值范围为_________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f9761eeec66bbc7a748bad1e79556bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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名校
5 . 已知函数
,
(
是自然对数的底数),对任意的
,存在
,有
,则
的取值范围为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f53f81bca037a4383c1fab122a3cd3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa6dbb3bc8c01505db52573b9379cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94f9d255ca420fa2486b11fcb7763b44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1774be56515d14a57b4a79d74df5387.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032e8dc00cdc96860c9cbf8ac09677fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
6 . 若
,
,满足
,则
的最小值__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad5a523e020e21797c0f83c2b6772588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28933bf7662085cbcf2f73a2da7dada.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82d90826e8acc5058a8e37bd0911417a.png)
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2017-12-16更新
|
372次组卷
|
2卷引用:四川省树德中学2018-2019学年高二上学期入学考试数学试题
7 . 若函数
,(其中
)的值域为
,则
的取值范围是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e15214bf19e65952aafd4ca6832960a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b21c8146c4fb1e2bbb99cde5ad688753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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