解题方法
1 . 已知实数
,
满足
则
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66be970fb6cce9db23b9406b0c3c65e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6ea614559b4ad922c275408102e7abe.png)
您最近一年使用:0次
2020-03-23更新
|
62次组卷
|
2卷引用:2020届吉林省梅河口市第五中学等校高三上学期8月联考数学(理)试题
名校
解题方法
2 . 在
中,角
所对的边分别为
,已知
,给出下列结论:
①
的边长可以组成等差数列;
②
;
③
;
④若
,则
的面积是
,其中正确的结论序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec2c3d6ef7d1d369f8873965630373f.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c9877e9a2ec72b4dad5ad449da96be.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1acd299ed2324e9e53ad9004dabb9e97.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d447455ca3fa23710faaa4bd6b5d7c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81c00f7e3c9b3ca278015e3ec031f102.png)
您最近一年使用:0次
名校
解题方法
3 . 已知在
中,角
,
,
的对边分别为
,
,
,
.
(1)若
,求
值;
(2)若
,且
,求
的面积
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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)
![](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/a4885a24045fa3665024500283d02dac.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e75fead42a57105b986dcf0e8f50f1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b246aa3b56becc905d3fb64c6d5ec4a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6d75a838ebbe4ecb373ab5b92222883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dddc33872e5211da1fff46d3952ca7c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
您最近一年使用:0次
名校
解题方法
4 . 已知等差数列
的前
项和为
,且
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4e70b360f988fdbd92300ab22c4613.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2693734765399876e9e93cdb110231c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfbe1a267041118b53f26b49f298a7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4e70b360f988fdbd92300ab22c4613.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
5 . 在锐角
中,角
,
,
所对的边分别为
,
,
,且
.
(1)求
;
(2)若
,且
的面积为2,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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)
![](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/fb503c2e66f87afbf3fe9c8d9ed6e98a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85ce7375192747befd5ee94b56d8a0f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2020-03-09更新
|
194次组卷
|
4卷引用:2020届吉林省梅河口市第五中学高三11月月考数学(理)试题
6 . 已知数列
是各项都为正数的等比数列,且
,
.
(1)求
的通项公式;
(2)若
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23993276bd87e4db846bbfbe7dbbef63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e5dadfc7d9b12bea102cc0ce5bfcc6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40d874f410d6d96f8b96946e3250f300.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2020-03-09更新
|
212次组卷
|
2卷引用:2020届吉林省梅河口市第五中学高三11月月考数学(理)试题
名校
解题方法
7 . 设实数
,
,
满足
,且
,则
的最小值是_________ ..
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1afddac11c3055bdef861f32a44da384.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ec4e006f4731d7a2f63d38bca66b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
您最近一年使用:0次
名校
8 . 在等差数列
中,若
,
,则
的前16项和为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e981afea0ead489903b15fdfdb7dc2b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0fdf87880de50cdd0c91025d9c42e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
2020-03-09更新
|
250次组卷
|
2卷引用:2020届吉林省梅河口市第五中学高三11月月考数学(理)试题
名校
解题方法
9 . 在等比数列
中,若
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed4a97d006747623dbebd765dd3d3324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92e3574f6fe7289841be7849f6bb4783.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d211c5a622d0be3b39931d814f9a683.png)
A.4 | B.8 | C.16 | D.32 |
您最近一年使用:0次
2020-03-05更新
|
313次组卷
|
3卷引用:2020届吉林省梅河口市第五中学高三11月月考数学(文)试题
名校
解题方法
10 . 在等差数列
中,
,
,则
的公差
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/562bf10d55724c77204c6953c7fbf7e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b68835ed64cf96c0c019dae916df8504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c98c59cd4749afdd21e73529fc84323.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
2020-03-05更新
|
325次组卷
|
3卷引用:2020届吉林省梅河口市第五中学高三11月月考数学(文)试题