已知在
中,
,
,
,求
(1)
的值;
(2)
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e90a2f8ddad631ffd33245a4644daf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa9f29383885f085b64b7091e1cd5884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6234368200898024b0ad9765db5e5b2.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c181f86de3c96a7ef7a1a04c3a438f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
更新时间:2018-11-19 16:12:35
|
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解题方法
【推荐1】如图,在平面四边形
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(1)若
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(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb566e101935acba966e1b5f7a72e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb961bd7db3adb76af2d4cedb611bd7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efa39fd2fbd0ffa55a35daeabe70e4eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/830544ca6d3d54528b6d3b21c2cb552b.png)
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适中
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【推荐2】已知函数
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(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d8b55148d0657283e3ddca681b4351d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
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【推荐2】在
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![](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/6db9829a71d5bd47e098e9a211a4179a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0674ffde4647ba503efafd67fbe11f4.png)
(2)若
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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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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/324bb97df383440ef75a72ce83b7c0c4.png)
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(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7132c2d8b2ff504e6c2ba36c4f6dcfaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb925a47e3d93fc09e50e8357f4e8620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a49ac6d4cd4797f6a0c654300b81cf1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825793ebd4bb376a09621f163ac990a9.png)
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适中
(0.65)
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【推荐1】记
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa5c413322386f5b22e322a4388edbc.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c234ed0f1a611f057d1528c71b095860.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
您最近一年使用:0次