名校
1 . 给出以下几个结论:
①若
,
,则
;
②如果
且
都不为
,则
,
;
③若
,
是夹角为
的两个单位向量,则
,
的夹角为
;
④在
中,三内角
所对的边分别为
,则
;
其中正确结论的序号为______ .
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75807858b7804a1ad2039c41f323a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90882db1028f1e2440339d203c1901e6.png)
②如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6893511ebfd1fac1412774e04e10748d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44bc5f0ef5e9129e22310d5ea17cf1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d5600adbf8003f263ae7baf49c05071.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2868a9fe011f56a80c9d1a8ee4604d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36fe4e713c108e118522a99ecd683924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0942b32552d016471809659af20ac97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4c7e86192bb666b3fb41b3694e79d53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
④在
![](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/3be845b564ed27a6093a44e5be491601.png)
其中正确结论的序号为
您最近一年使用:0次
2020-05-15更新
|
407次组卷
|
2卷引用:四川省眉山市2018-2019学年高一下学期期末数学试题
解题方法
2 . 下列说法中,正确的有_______ .(写出所有正确说法的序号)
①在
中,若
,则
;
②在
中,若
,则
是锐角三角形;
③在
中,若
,则
;
④若
是等差数列,其前
项和为
,则三点
、
、
共线;
⑤等比数列
的前
项和为
,若对任意的
,点
均在函数
(
且
,
、
均为常数)的图象上,则
的值为
.
①在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
②在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/336bbf462ae13b146976ef65a58a5969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
③在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbe02d5a322e6f254bd8d51a5b346c61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b925cbc2194a19c1830b9dd56cf1c4c5.png)
④若
![](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/b3476fd22fa21beabbae9460e1406d45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a906525d675d27085f1ceda8d9996ca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564b9b7e76e0fc8685023137b0b7f7ba.png)
⑤等比数列
![](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/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41f32693d25ece7f8e22c34a183537f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e058d98f8a257226d0fbcc941f72f4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03b011f69dfc5262a3d82f64676739b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/406185f4ad8bcd99e23adc8d289088ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
您最近一年使用:0次
2020-03-02更新
|
543次组卷
|
2卷引用:四川省蓉城名校联盟2018-2019学年高一下学期期中联考理数试题