设非零向量
,
的夹角为
,
,则“
”是“
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/224190cb5890d9ca9c1bd3401d0b0e36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba7466f3ffa97e826620e45cd4134dea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3462b4cd8e6c38b60e33c9730fd76c11.png)
A.充分不必要条件 | B.必要不充分条件 | C.充要条件 | D.既不充分也不必要条件 |
23-24高一下·北京·期中 查看更多[2]
更新时间:2024-05-06 09:49:37
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相似题推荐
单选题
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适中
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【推荐1】给出如下四个命题:①若“
且
”为假命题,则
均为假命题;②命题“若
,则
”的否命题为“若
,则
”;③命题“
,
”的否定是“
,
”;④在
中,“
”是“
”的充要条件.其中正确的命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd5371a6f0f82c65dd22f75f8b807c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdbb2015f2be55935cb9e48d967190df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3798d6c2e5eac9c1d8b044efd5081acf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd489150af4efdecc3489b7af74ce3d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1485a4756c56f1126b9825d5019d544c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/848b51786f38846a1cb3faa72e7356aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21da825c05d5b169a5e7748f70602b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
A.②③④ | B.①③④ | C.①②④ | D.①②③ |
您最近一年使用:0次
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【推荐2】已知向量
,
满足
,且其夹角为
,则“
”是“
”的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2150cb0060a14e88e93c33cf456ae832.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/515b1e449cde902a74977b1fc3b31100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3efffb3ac0bc20dd414552daec07b7e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8505aaf8a003faa6051bbd1edaa5ee91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f6e2d8387a1ff83bcb16ebae1e8005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80a67686c997eb56883204b6756f6b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充分必要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
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【推荐1】直角
的外接圆圆心O,半径为1,且
,则向量
在向量
方向的投影为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee5d0096a32b0b82f575de58020302f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dd74fe516d523914e42a54176c28c4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e5b64c049e2c6aa50e3008f3e2fdeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4b62ea9f2ffb1342d9edc22e9649cad.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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名校
【推荐2】在
中,角
所对的边分别为
,
为
的外心,
为
边上的中点,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858850da3c7cf2285208d36cfc110036.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b97bb18e5ca34d22b5e827316a122a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc687e746a9d23424f13b3e1045d294.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26c39741c1ae44f5858209f4dd9b760a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858850da3c7cf2285208d36cfc110036.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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解题方法
【推荐1】已知双曲线
的左、右焦点分别为
,过点
的直线与双曲线在第二象限的交点为
,若
,则双曲线
的离心率是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae1b38c1687926ea82798587886569a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐2】已知
是边长
的等边三角形,点D,E分别是
,
上的点,且
,
,连接DE并延长到点F,使
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ff214d99784c6b23b7784bdaf3ed37a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce9a4fe0565a6810452d3fa9c747662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c495c23d3889f03bd989e6a69189af6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49305234817f4cff077ff59226b609a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/131a8160f29ba2f4a448d72c4482773f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23bfd5d5a8a24c86847e91af3d952cdd.png)
A.6 | B.18 | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐1】已知平面四边形
的四条边
,
,
,
的中点依次为E,F,G,H,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cb6f1a931d1d6c9175f19d1b4584a6f.png)
,则四边形
一定为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cb6f1a931d1d6c9175f19d1b4584a6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f20e665f13e64e4c924d022708cdc56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
A.正方形 | B.菱形 | C.矩形 | D.直角梯形 |
您最近一年使用:0次
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解题方法
【推荐2】已知向量
,
满足
,
,
,那么向量
,
的夹角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4244dd3d11b8c8131ffecd896c12a27c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/082c6926889f84f438ea35f70bf05f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6f7e83cc4dac85dc329d79c5ec17611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次