如下图所示,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/a560d0ce-ac45-4931-a5a2-a74fea5e6438.png?resizew=100)
(1)若
为
中点,求
;
(2)是否存在实数
,使得
?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f12cacb8b66100d800356b2ba0b0df6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c278812c4813f6391c7993574e2f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6623de5abdeae42cb02348563ff103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f0d53573554894dbe3b31027d7cdfe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e513fd59e59bda50100de1b4571a235.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/a560d0ce-ac45-4931-a5a2-a74fea5e6438.png?resizew=100)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c174f127b7234ebb6a87d9185bd2210.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c47c25136e592e22c28008ea5b74e5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
更新时间:2021-07-12 18:12:18
|
相似题推荐
解答题-问答题
|
较易
(0.85)
名校
解题方法
【推荐1】(1)在直角三角形ABC中,C=90°,AB=5,AC=4,求
;
(2)已知向量
,
,
.若△ABC为直角三角形,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf586f28e8fbdd8c30227f60d1aba660.png)
(2)已知向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e861bcb79b53c72c77bcafac31a8cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46858ddeeb71efb0c89d8aaf683042e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
【推荐2】已知
为坐标原点,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3275fa0dd88185408befc8a71d61583.png)
(1)求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d401876b078e318413b8ad876c54b7be.png)
(2)在x轴上有一点
,使
有最小值,求此时P点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67695fc0fa4a7fd9bfcf50374faf1c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3275fa0dd88185408befc8a71d61583.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d401876b078e318413b8ad876c54b7be.png)
(2)在x轴上有一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/811f2b0933367b7cb32a7696510f2089.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
解题方法
【推荐3】已知向量
为向量
的夹角.
(1)求
的值;
(2)若
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eb682ea6d7f9b6dfcdb884de44fdef4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefd06c239145a2b6ae87a955aa51414.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/106f3fb25c685d48776fa7eb23bad497.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
【推荐1】已知向量
,
,其中
.
(1)若
,求实数
的值;
(2)若
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9e1df6fa6edfdd05358932b3ce422c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a42414eda778efd6d73bb3f1ea354860.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069da5c624837df29947b7b8bf722097.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5aa846a5b7c96fe2ce665eb1ea5f0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
解题方法
【推荐2】已知O是坐标原点,向量![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e66fc2dfcef35c0d6cd2b151a0b33c.png)
(1)若
,求
的值,
(2)当
取得最小值时,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e66fc2dfcef35c0d6cd2b151a0b33c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66790293bccf6d4410e38dbcfe41f770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59880e470359d8e9faf6ae5ce155cf2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd79ea6078a73c1e7ec4769e5546abec.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐3】在平面直角坐标系中,向量
.
(1)当
//
时,求
的值;
(2)当
时,求
及
|的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8b653a857bcabdb04f88e190ea08d9f.png)
(1)当
![](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/36a1b09c653185842513e24ebba60bb3.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf21fef3026cfe445a855c94cab5c84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cfe95f520c7b454ceabb2ae9af0a87.png)
您最近一年使用:0次