名校
1 . 在
中,角A,B,C的对边分别为a,b,c,下列四个命题中,正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.当![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.当![]() ![]() ![]() |
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2 . 在
中,角A,B,C所对的边分别是a,b,c,
,
,
.
(1)若
唯一确定,求m的值;
(2)设I是
的内切圆圆心,r是
内切圆半径,证明:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d5738ee6a87acfffe81ac0f26610310.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)设I是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c0ad1334e7ac2a8159cc9824c75f20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e8e8a2d8447518d2b5083d5fd766374.png)
您最近一年使用:0次
名校
解题方法
3 . 在
,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
您最近一年使用:0次
2021-09-06更新
|
2901次组卷
|
5卷引用:江苏省扬州市高邮市第一中学2022-2023学年高三上学期阶段测试一数学试题
江苏省扬州市高邮市第一中学2022-2023学年高三上学期阶段测试一数学试题江苏省盐城市滨海县东元中学2020-2021学年高一下学期期中数学试题(已下线)第六章 平面向量及其应用 章末测试(提升)-2021-2022学年高一数学一隅三反系列(人教A版2019必修第二册)江西省南昌市第十中学2022-2023学年高一下学期第二次月考数学试题河北省张家口市2023-2024学年高一下学期期中质量检测数学试卷
名校
4 . ①在
中,若
,
,
,则此三角形的解的情况是两解.
②数列
满足
,
,则
.
③在
中,
为中线
上的一个动点,若
,则
的最小值是
.
④已知
,则
.
⑤已知等比数列
的前
项和为
,则
,
,
成等比数列.
以上命题正确的有______ (只填序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a110bb6e761a161260c92dea2121d2db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f48934086667319958726544e37f649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54a36173cd9b7b28e91619d715cb569.png)
②数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab9f5746a7728ce4aa2557d1269ffb37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeaa7871bcc1c45c752895d535e907ce.png)
③在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810fee760e06028fb7d37e65db79bfa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4f0d68fb700d93bb711ab383bc0df71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
④已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/886f3c1fc76321833d2a8dd8f1a0b707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98b27502c1bb8e01c37fa5a72853814c.png)
⑤已知等比数列
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5188d6760683a860adab0cda195cdf80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd6fe11dfa538e67bfd63478fc428a1.png)
以上命题正确的有
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