名校
1 . 在共有2023项的等比数列
中,有等式
成立,类比上述性质,在共有2023项的等差数列
中,相应的有等式______ 成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80eae440bc359521b680637e9401b797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
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2 . 若x满足
(其中i为虚数单位),则x=______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bfd52ce171cf260b43ecc30dab75f6c.png)
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解题方法
3 . (1)已知实数
,
满足
,求证:
.
(2)若实数
,
为正数,且满足
,用反证法证明:
和
中至少有一个成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/838b9f49811c77cbf7d12d3af4a63373.png)
(2)若实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7dbc702617c765a573961953cc0901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba1d7973f41f2050afd1759a0e480e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dfd31530f4f4d297248c3e39f42d8fb.png)
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解题方法
4 . 欧拉公式
将自然对数的底数
,虚数单位
,三角函数
联系在一起,充分体现了数学的和谐美,被誉为“数学的天桥”,已知复数
满足
,
.
(1)求
,
;
(2)若复数
是纯虚数,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e83fbbc5fbdc4887691d675a14691fa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0436ff4c817f257ea0b8a9e25854860.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b115a0e0342044fc8987c39d15915a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1be674fcbd2fd1a608fd4a9705c70db4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c5b0f762fb1ebfaf4cc2cbe0051e0c4.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c64b75adfa934653fb3447a898f3fde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7359cd5390b336e0edd0be8af93b4ec9.png)
(2)若复数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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5 . 用反证法证明“
,若
,则
”时,应先假设__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360ff131c51a4ef6745538c18cec92c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32378da61ce0df3dd46ccc77e906009e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48adb8a59b5c02fad5eada1b35171cf3.png)
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2023-10-11更新
|
118次组卷
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3卷引用:上海师范大学附属中学闵行分校2023-2024学年高一上学期期中数学试题
6 . 若复数
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36024e5403c79c994996bc92b90d74f0.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65397720477637b744fd392fa5c2fb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36024e5403c79c994996bc92b90d74f0.png)
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7 . 若
是关于
的实系数一元二次方程
的一个根,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f54f65a2b1343a5705a0ce209bd0404f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5707186257494f1fea86066f2778b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
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2018-07-07更新
|
519次组卷
|
7卷引用:上海市闵行区2022-2023学年高一下学期期末数学试题
上海市闵行区2022-2023学年高一下学期期末数学试题(已下线)9.3 实系数一元二次方程-同步精品课堂(沪教版2020必修第二册)【全国市级联考】上海市嘉定区2017学年第二学期期末考试高二年级数学试卷人教B版(2019) 必修第四册 逆袭之路 第十章 10.2.2 复数的乘法与除法人教A版(2019) 必修第二册 逆袭之路 第七章 7.2 复数的四则运算 7.2.2 复数的乘、除运算广东省江门市第一中学2023-2024学年高一下学期第一次阶段考试数学试题(已下线)专题04复数-期末考点大串讲(沪教版2020必修二)
8 . (1)设
,
,比较
与
的值的大小关系;
(2)已知
,
,
,其中
、
、
为实数,请用反证法证明:
、
、
中至少有一个为正数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b41d84627f6229005178c8b69d5d401.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d18e9ca603e7d02cf1788acdf105f2.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/651b911b5b89924a9f1715d847e9d419.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76a130665c0842c5594882a282eab790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0446cabe6eef4e5012d0bcf2be336f06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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9 . 设
是两个实数,给出下列条件:(1)
;(2)
;(3)
;(4)
;(5)
,其中能推出“
中至少有一个数大于1”的条件是___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9707dcd2a38e5cb5fe8222ccacb3e09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7dbc702617c765a573961953cc0901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69bbd0aae5a4f6129fc78f88f662f092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89dc8118d95d6c7bd5b7d38667a498e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea134f599285e3d32d2ab3e7186990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
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2020-01-31更新
|
290次组卷
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3卷引用:上海市闵行中学2023-2024学年高一上学期10月月考数学试题
10 . 求证:若
,且
可被5整除,则
中至少有一个能被5整除.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96bbe02994ee5aa57e308832ea01a6bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f0281e6bbdbe08beeccb55adf84536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
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2021-03-24更新
|
193次组卷
|
3卷引用:上海市闵行中学2023-2024学年高一上学期10月月考数学试题