解题方法
1 . 数列
是等比数列,等差数列
的前
项和为
,满足
,
,
,
.
(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/83cf38189d5cbf627d2b82ac0eb76006.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4995fa0403e013d888c0935ebfe15024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eda3d29986706bd3c00be6c242b6eb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7410cb892e7de60c5b29a64ac086ed96.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcfe30a503487a2b83f7d496b7b7aef2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.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)
您最近一年使用:0次
2 . 已知函数
.
(1)求不等式
的解集;
(2)已知
是函数
的最小值,若正数
满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450799da74a73a577ec4ae7b18134d53.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e23a38b3f33e10d52249b42b945eb48.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360a669b99179408c274d35698b8bd7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764274d68d2c72b983d7803ebe994aca.png)
您最近一年使用:0次
3 . 已知
,函数
,
.
(1)求
在区间
的最大值
;
(2)若关于
不等式
在
恒成立,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b0494faba40f2a5e7e1879b4198231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a07711b73ed25c334e5eb2eccb52456.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ad25134fe5a0d7f1df703ce04477e01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7ef169f00be74020ff6c7c740bf734.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a239d924a26dbc7f33052c63a20a327a.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b4955c5adc717b7f6f0b975e0724ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966b60302d80d8613675bb3dd5c03164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc2d45cb4b93d41e49c20672e3483c.png)
您最近一年使用:0次
名校
4 . 如图所示,在边长为a正方体
中,
分别为棱
的中点.
![](https://img.xkw.com/dksih/QBM/2018/10/22/2058996036788224/2061816401215488/STEM/691b0b0cd4a046de9aeded9bef0987e5.png?resizew=246)
(1)求证:点
四点共面;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42c2d86d8daea5e652d99fe1c6bc3f9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff3147f4dce48df80779e0da83e9d0b3.png)
![](https://img.xkw.com/dksih/QBM/2018/10/22/2058996036788224/2061816401215488/STEM/691b0b0cd4a046de9aeded9bef0987e5.png?resizew=246)
(1)求证:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42c2d86d8daea5e652d99fe1c6bc3f9a.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8511a1b768df56495af12fc303f869dd.png)
您最近一年使用:0次
名校
5 . 已知函数
(其中
).
(1)求
在
处的切线方程;
(2)若函数
的两个零点为
,证明:
+![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51dc59ff48b4bf48d48235380c31b337.png)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b7dbe5a36a6dc54c9d48587e09d37a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff293a328ac3023850eb29ef0e875784.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8012da6c8daa8a39391502497a9795ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a821813418c650ef917ea4fdb0526130.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51dc59ff48b4bf48d48235380c31b337.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d59f2b93e0978ffe5e5b787e306928b.png)
您最近一年使用:0次
名校
6 . 设关于x的方程2x2﹣ax﹣2=0的两根分别为α、β(α<β),函数
(1)证明f(x)在区间(α,β)上是增函数;
(2)当a为何值时,f(x)在区间[α,β]上的最大值与最小值之差最小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212e78e289a58fae2d81c9abd463f45c.png)
(1)证明f(x)在区间(α,β)上是增函数;
(2)当a为何值时,f(x)在区间[α,β]上的最大值与最小值之差最小.
您最近一年使用:0次
2017-10-08更新
|
486次组卷
|
5卷引用:]重庆市铜梁县第一中学2018届高三上学期第一次联考数学(理)试题
7 . 已知数列
的前
项和
满足:
.
(1)求证:数列
是等比数列,并求数列
的通项公式;
(2)若数列
满足
,
为数列
的前
项和,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/67bd36be3bb1aa5eb5db74b2a7af7f7e.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c485d7f863edc6299df64bd89d4705b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e2b779d4e1468d0cc9bb859653f618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de633c277a234e59e274ffb1f9d59718.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cf49305249eb983fb10c95c2287d1ee.png)
您最近一年使用:0次
2017-06-20更新
|
996次组卷
|
4卷引用:重庆市铜梁中学2021-2022学年高二上学期第三次月考数学试题
8 . 如图,在四棱锥
中,底面是边长为
的菱形,且
,
,
分别为
的中点.
(1)证明:
;
(2)求异面直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbb05b8b630052ff544249ebd72d95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4e5548755c90782e8e8c2f7194220f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930e85bc9f73e86cfb6ce9b076433f1b.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2b73b8c063c120986eee308070dcb4.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2017/10/26/1803690576961536/1804519103963136/STEM/8b528eb3855044abaa4c411db5fde2d2.png?resizew=208)
您最近一年使用:0次
13-14高三上·江苏盐城·阶段练习
名校
解题方法
9 . 如图长方体
中,底面
是正方形,
是
的中点,
是棱
上任意一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/6f5798b9-2fcb-49d6-9da1-df593f980085.png?resizew=162)
⑴求证:
;
⑵如果
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fdae2749f537f9308d067c1fec19d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/6f5798b9-2fcb-49d6-9da1-df593f980085.png?resizew=162)
⑴求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7788f70d6ada894a892fc4f2474ef27.png)
⑵如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df109566d082b8fc65e44f5db40852c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
您最近一年使用:0次
2016-12-02更新
|
859次组卷
|
7卷引用:重庆市铜梁县第一中学2017-2018学年高二10月月考数学(理)试题