下列命题正确的是________ .(填写正确的序号)
①在等差数列
中,有
,则
;
②已知数列
是正项等比数列,且
,则
的值可能是
;
③已知函数
是定义在R上的奇函数,且对任意
,都有
成立,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b6ed8cbd4162259985201ddfa4a049.png)
.
①在等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/788beef99e78bcb25b193a0e50362d9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c634e9a8afd9e6c931307dfaabb06810.png)
②已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3469ea4b3664ef316692458c96ac68d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
③已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87e04b4cd16224102ef696222caa56ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b6ed8cbd4162259985201ddfa4a049.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afcc9c8a1885dad421eb332afc8c6039.png)
更新时间:2020-11-20 07:51:08
|
相似题推荐
填空题-单空题
|
适中
(0.65)
名校
解题方法
【推荐1】已知函数
和
都是奇函数,定义域为
,当
时,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f331369241572a58d94bc298a12cf77.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f25990e1d373ac30d7480633e47cc1ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cd40cea1214318863c7143f41ee3ab7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d923750277c4ae4f8a7db57254c635b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f331369241572a58d94bc298a12cf77.png)
您最近一年使用:0次
填空题-双空题
|
适中
(0.65)
名校
解题方法
【推荐2】已知函数
.
(1)那么方程
在区间
上的根的个数是___________ .
(2)对于下列命题:
①函数
是周期函数;
②函数
既有最大值又有最小值;
③函数
的定义域是
,且其图象有对称轴;
④在开区间
上,
单调递减.
其中真命题的序号为______________ (填写真命题的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/312d4637083387ff2728f5eb31bc3655.png)
(1)那么方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3047d4ab078dafc06c047bcbf0a6ffaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/203101c0238c9d9b8cdf0dfb340d077f.png)
(2)对于下列命题:
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
④在开区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
其中真命题的序号为
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
真题
名校
【推荐1】已知函数
,等差数列
的公差为
,若
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0778282cbb970e52febe325915b8420f.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99eaeb2ab68a49074d623ffca072fed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eeaf696094273c6c1c49555d9634382.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0778282cbb970e52febe325915b8420f.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
解题方法
【推荐2】若前
项和为
的等差数列
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5d2c6282df9bd122ad3b2830cfb40c.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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45f7a2c45f58ff7baf7ad7c325f664cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5d2c6282df9bd122ad3b2830cfb40c.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
【推荐1】已知等比数列
的前
项和
,令
,则数列
的通项公式为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414187fca31df508dbf88d7f2bb83662.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/2244abf7767295189d81d3fba7e9dc36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663c77cb5f4757d58053f7ae9b52dac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414187fca31df508dbf88d7f2bb83662.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
解题方法
【推荐2】已知等比数列
的公比
,若
,
是函数
的极值点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda6dc559d07bc22c9a0ed1e3a6d01d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0e0c1821d0db50ed1194f1175a7eda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
解题方法
【推荐1】在
中,角
、
、
所对的边分别为
,
,
,且
,则
的最大值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/0bc955bed3274a20ccc96d8ca7f6c21b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcfd059a9be6d1600e3a6e1deead8455.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
【推荐2】已知抛物线
的焦点F,过F的直线与抛物线交于A,B两点,则
的最小值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294b85c50741fbeeeb3f52f012434afa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/817b78007c08e09b2f04dc63b17d6586.png)
您最近一年使用:0次