名校
1 . 设a,b,c均大于0,
,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71dd40d3df2762d6e6bdefcb5f397269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0818daf1a57c4b4c3666d411dcc76f8a.png)
A.0 | B.1 | C.3 | D.![]() |
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2 . 在数列
中,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1af30b30bc7224984b3ec1fb7a994246.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56c6ce06c1cd6542d0bb2bedaf66b8cf.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2021-11-15更新
|
885次组卷
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2卷引用:陕西省铜川市第一中学2021-2022学年高二上学期期中理科数学试题
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解题方法
3 . 若数列
的通项公式
,则此数列( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d2c8d7beb11c4052aad6325120a1af8.png)
A.是公差为-2的等差数列 | B.是公差为2的等差数列 |
C.是公差为3的等差数列 | D.是首项为3的等差数列 |
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4 . 在等差数列
中,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58365ff21052f2f978c11844b002b933.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e29d972ba27bf676989a5abfb51a40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a7bf78468ca801ef305ce4f76986da1.png)
A.6 | B.3 | C.2 | D.1 |
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5 . 在正项等比数列
中,
,则数列
的前9项和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ef50f3b3b033916bd2ac3009424d6f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79f232288a6d4b336e06153d81c41fe.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-11-15更新
|
935次组卷
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6卷引用:陕西省铜川市第一中学2021-2022学年高二上学期期中文科数学试题
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解题方法
6 . 若
,则下列不等式一定成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f05930837039d924f84f12ec886733d.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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3卷引用:陕西省铜川市第一中学2021-2022学年高二上学期期中文科数学试题
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7 . 已知数列
,
,
.
(1)求
、
、
、
;
(2)猜想数列
的通项公式,并用数学归纳法证明你的猜想.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d52e84c35db6437e837497fc9696be97.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
(2)猜想数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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2021-11-13更新
|
488次组卷
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2卷引用:陕西省铜川市第一中学2021-2022学年高二上学期期中理科数学试题
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8 . 在
中,角A,B,C的对边分别为a,b,c,若
,
,
,则A等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cecea7657bb88976926ee41790d49012.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3320a13248a3a1208ff6ee85c9d26f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a74c3e9a8f3f11e98b4fa659a97679.png)
A.30°或150° | B.60°或120° |
C.60° | D.30° |
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2021-11-13更新
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313次组卷
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3卷引用:陕西省铜川市第一中学2021-2022学年高二上学期期中理科数学试题
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解题方法
9 . 已知数列
满足
,
.
(1)求数列
的通项公式;
(2)若
,数列
的前n项和为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed38f6c023490f5eb95d2ae255a8ea31.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7d3d55a85012933f91c5d8d27d8801d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2021-11-13更新
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2卷引用:陕西省铜川市第一中学2021-2022学年高二上学期期中理科数学试题
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10 . 已知实数x,y满足约束条件
,若目标函数
的最大值是5,则实数m的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c91a94ca9315f575ea48e77dc6535daf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29053d9d88af33cd4c0abdb7e6b08c24.png)
您最近一年使用:0次
2021-11-13更新
|
277次组卷
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2卷引用:陕西省铜川市第一中学2021-2022学年高二上学期期中理科数学试题