有下列命题:①双曲线
与椭圆
有相同的焦点;②“
”是“
”的必要不充分条件;③若
与
共线,则
,
所在直线平行;④若
,
,
三向量两两共面,则
,
,
三向量一定也共面;⑤
,
.其中正确的命题有_________ .(把你认为正确的命题的序号填在横线上)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6d49e09b17b19d7c787e95bcf1e9731.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06b1ddc7d49161e0eb8cecdab16285d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1883e133c6a6d2bf8b440bbe62b7e75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0c61081ca6c6c93ea34093fed10fa78.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.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/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/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ecdb7ce5f44d33119e5cf1d9f3b0315.png)
更新时间:2018-01-10 12:34:21
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相似题推荐
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适中
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【推荐1】给出下列五个命题:
①当
时,有
;
②若
是锐角三角形,则
;
③已知
是等差数列
的前
项和,若
,则
;
④函数
与
的图像关于直线
对称;
⑤当
时,不等式
恒成立,则实数
的取值范围为
.
其中正确命题的序号为___________ .
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c385a8d88836f6cae1255d86c1b6d76a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d3d04194297b37727db116081a662e.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30c77720b8b287e64c5e840dcc8db528.png)
③已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](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/effdf8cadd1a54cb5e0f3a621dd4ea80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a68405af59395b5b557581b32f97a5ca.png)
④函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26efb9f32f6cb608753f9189c6b48644.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c67f5cfce32b3ed37987a4baa430062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
⑤当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1864b98153200f5929787295de2c1e38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e9bd06dbb60db9ef56db0d694505330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b06647930e162809da06a1a72b9d9f.png)
其中正确命题的序号为
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【推荐2】下列命题中,所有真命题的序号是_____________ .
(1)函数
的图象一定过定点
;
(2)函数
的定义域是
,则函数
的定义域为
;
(3)已知函数
在
上有零点,则实数
的取值范围是
.
(1)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2c37e6d1d2206982cc41db56c32140.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ce2f5e22175e3ff8ab5e0afca58f9c.png)
(2)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ed2dd8a797d6da9c89e858aed9a7da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ce2f5e22175e3ff8ab5e0afca58f9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3247f03357462fec934f37c65ebdc77e.png)
(3)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a76d2865f358630150dc9611e16d804.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1242ec96ac54e2fd418988d5190a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccc8350b12974ffc8d06fce36d158f02.png)
您最近一年使用:0次
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【推荐1】已知函数
的定义域为
(其中
),则“
在
和
上分别单调递增”是“
在
上为增函数”的__________ 条件.(填“充分不必要”、“必要不充分”、“充要”、“既不充分也不必要条件”)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05bd7b6d218bb91af7e165cd82edf1f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e934b4f6f2c5bc72078c19eb6805db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a83327f6e116a33eeb679ab0b9264ad9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05bd7b6d218bb91af7e165cd82edf1f5.png)
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【推荐2】集合
,
,则“
或
”是“
”的条件________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b307a26adbd69e3678145a0a5b43440f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a8ad68773a7a9f5a6574df3b4b174e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23af61cd402b3789af2401bde9cbefe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3af8af9e2ff357d4e668105da5955c3.png)
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