名校
1 . 已知方程
,下面四个命题是真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/608e3b6e18246d45521a240b5bfc5009.png)
A.当![]() |
B.当![]() ![]() |
C.当![]() |
D.当![]() ![]() |
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名校
2 . 如图,正方形
的边长为
,
、
分别为边
、
上的动点,,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
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解题方法
3 . 已知实数
满足
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4edfef181ed229ed1a3bb2295be7db9.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
4 . 已知x,y,z均为正实数,则
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa371e64f4f8524af2135c25d580002.png)
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5 . 设
,则
的最大值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a521891098b625f372ff648d110afe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d61b2953ddf211685e32116d834a9f9.png)
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2024-05-28更新
|
603次组卷
|
3卷引用:河北省秦皇岛市青龙满族自治县第一中学2024届高三下学期5月模拟考试数学试题
解题方法
6 . 在等腰梯形
中,
,若
,则梯形周长的最大值为______ ,梯形面积的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/813d14803196f2fc6583b71db3358256.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
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7 . 在
中,若
,则
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35885b37b537198fe119173a86f530cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46aac05f079db1b20f15d1627b2661d8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
8 . 在
中,
,
是
的中点,延长
交
于点
.设
,
,则
可用
,
表示为__________ ,若
,
,则
面积的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d74b1d0480790400a9223e4437afdba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3adc4ed291596abf3bb93ae7a075d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f386f5b56b07b96f2600da1be15414a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7239b3f2d88c2e45e17e5de9ae1a332.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/684d2bbdd30443a7b73738d051d9a5dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9938f4e86299b789840a58159eb9527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2024-04-24更新
|
1227次组卷
|
3卷引用:天津市部分区2024届高三质量调查(二)数学试卷
2024·全国·模拟预测
解题方法
9 . 已知正三棱锥
满足
,则该三棱锥侧面积的最大值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7273edffdd59159d45e6c9429431d53f.png)
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解题方法
10 . 设
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60f252adc85a50e2d2ee64869dfdefee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/744f98c50d9b454863694d9e856ef21a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eb761bc720dc2f3f35cc128918cf2bd.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2024-04-08更新
|
586次组卷
|
3卷引用:重庆市2024届高三高考模拟调研卷(六)数学试题