(1)求值:
;
(2)已知点
,
,
,
,试问
与
是否共线?并证明之.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d982a551f84f6c298122e8c9189f3d09.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd162f6b5ea3023b9126daf61e76428.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02af485e17e7628fd5a3ace6e0a32ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43c2df1ec4f5d17fa8590e920fac61af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c3b075ff38034555490ac2da768916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe35c91649a5bea2518387a2b36e0c0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbba7bff7720b3aa33f29936ede7819e.png)
更新时间:2019-12-18 19:40:19
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解答题-问答题
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适中
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【推荐1】已知函数
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解答题-证明题
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适中
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解题方法
【推荐2】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d2a119403159f251ca90d8b6f23ecbc.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6e5408daf8c4918e8baf4f4cfd0a4cb.png)
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解答题-证明题
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适中
(0.65)
真题
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【推荐1】设向量![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba19c3eb19129176efcc1199807afa6d.png)
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∥
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba19c3eb19129176efcc1199807afa6d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/696bf63a3a726968a19b8927be5a2112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be8a7908f3ae75a5c7c965437bd8831f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee4f8ace3f0ecd876552f8a2fa62d4f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3a31177f20d2893c585fafb5db8c331.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b988d54001de969dd72cfd3f5d27de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/696bf63a3a726968a19b8927be5a2112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0928087301c0628fba2a9cd3af14f34d.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】已知
,
,
,且
,
.
(1)求点E,F的坐标;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd5fb552c79ab5d45b0aeafc06e58542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4f8edea2e5d4e08cf6210d0e9f3fdbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3e7ca8d61e3b8b944d5b3905355bbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd82ba6151fd7144aadbfb2172e2318.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fca8cc07a2f39a1f66f6a2de13aa685.png)
您最近一年使用:0次