如图,
,
分别是矩形
的边
和
的中点,
与
交于点N.
![](https://img.xkw.com/dksih/QBM/2022/3/15/2936846367318016/2948298233651200/STEM/aad33143-e39c-4ac9-b881-e0801d4474af.png?resizew=149)
(1)设
,
,试用
,
表示
;
(2)若
,
,H是线段
上的一动点,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/2022/3/15/2936846367318016/2948298233651200/STEM/aad33143-e39c-4ac9-b881-e0801d4474af.png?resizew=149)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291b593c5c12e80f6d66adddb24eb99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41dbdda9fb5813e20558da8aeeee4b37.png)
![](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/be64d59ac6538a0f4d79fb825e082081.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4960228688823cd6e672ed3de6fcbfc1.png)
更新时间:2022-03-31 21:51:01
|
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解题方法
【推荐1】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df2baaab6b5ed5fefc82872f71664d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e34d9efdd983d150ac00679264c6126.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ff214d99784c6b23b7784bdaf3ed37a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fdeba282b028321696be7f90f2cbfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3aa688caadfeb5bdf9c7dfecb5afa31.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882c648f6b0a5ef8fd87f3996b7a414b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88a8d811690ed17e8d918b8c434defbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b985a5d684e6466b743dac5b6ec1eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa2ad2ecbe7694e10627492a2fa62b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7067d75ba2f69ce64a83f2e6d971e86.png)
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【推荐2】已知
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(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad5e54f557d62b594cc86f80b4bedf1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb5d89b04570ceda2c29e11cb27a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5f1b06a56fc382feed28e01f1ad102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef2723673c90347f6dd58346278c7fa.png)
(2)若点Q使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55375aed9b3d370a169e889883102c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5cb63aeea0b37799404c8fec092b21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee0e611318ee3f01b95ba8f2188cb8bc.png)
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【推荐3】已知点
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047b9a2ffce96f7fd9aeab3b2b588397.png)
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解题方法
【推荐1】已知向量
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,问:是否存在这样的实数
,使不等式
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