1 . 已知
都是正数,求证:
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfbefc06b3b4e54a6a1690e870efc69b.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2298ce02fb0d122e2b23438a63c4c820.png)
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名校
解题方法
2 . 在
中,内角
所对的边分别是
,已知
.
(1)求证:
为等腰三角形;
(2)若
是钝角三角形,且面积为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/df6f452f9c9ac2741f29e0ec66e65cde.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67336ccd79b321083fa8821e524c7467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c49386fb1d7557c1dc9956a4495e2ca9.png)
您最近一年使用:0次
2020-09-11更新
|
564次组卷
|
5卷引用:海南省临高县2023届高三模拟考试数学试题
海南省临高县2023届高三模拟考试数学试题【全国百强校】江西省南昌市江西师范大学附属中学2019届高三三模数学(文)试题云南省昭通市实验中学2018-2019学年高二下学期期末数学试题江西省宜春市奉新县第一中学2019-2020学年高三上学期第四次月考数学(文)试题(已下线)考点17 正、余弦定理及解三角形-备战2021年高考数学(理)一轮复习考点一遍过
名校
解题方法
3 . 已知各项均不为零的数列
的前
项和为
,且满足
,
.
(1)求数列
的通项公式;
(2)设数列
满足
,数列
的前
项和为
,求证:
.
![](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/86fc336b4a83bf6d66c4afcc431597f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faab8277e7dad4f15f5223ce873040c7.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/413fd42df3a6f774638ce6c169eb65b6.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa9eb5df4493d73ef26425478f930f5c.png)
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2020-03-16更新
|
578次组卷
|
4卷引用:2020届海南省海南中学高三第二次月考数学试题
解题方法
4 . 已知存在
,使得
,
.
(1)求
的取值范围;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799b324b514d6044672c133d8fef2dc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ead0fd16b61be43dce5f4f387ef38b2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3c270c7508ec18bfae26af47763aab7.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55d57f06fe39039e0be9d27ce28b1b35.png)
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2020-03-18更新
|
264次组卷
|
2卷引用:2019届天一大联考海南省高中毕业生班阶段性测试(三)文科数学试题
名校
解题方法
5 . 已知数列
的前
项和为
,且
.
(1)证明:数列
为常数列.
(2)求数列
的前
项和
.
![](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/824ecbb3ea451c654356258588464578.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a19cb4fc66f9d08e48ad8918cecaa05.png)
(2)求数列
![](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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2020-03-15更新
|
899次组卷
|
4卷引用:2020届海南省全国大联考高三第三次联考数学试题
6 . 设等比数列
的前
项和为
,已知
,且
成等差数列.
(1)求数列
的通项公式;
(2)令
,设数列
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74ab8686e127b133fc14efd63fc9700f.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b29ee83dfef76fa4425a09ee8152b2b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1056f02e4a7e9b8fd479519eec2d9b3.png)
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10-11高二下·海南·期末
7 . 设函数
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d1b50a876fa992d90d8b481e087180.png)
(1)证明:
;
(2)求不等式
的解集;
(3)当
时,求函数
的最大值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037c0152137eeedfa94ba3a1fda5fa3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d1b50a876fa992d90d8b481e087180.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d9148f70d6b62d535b32aa6552c1607.png)
(2)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447d6f62c09c1d05346fd16a24159f6e.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0aa2ef928b6e3341d0a0dc6d8055b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b0bf8e2bf9ca47fc18043204a50d19f.png)
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