解题方法
1 . △ABC的内角A、B、C的对边分别为a、b、c,若
A:
B:
C=7:8:13,则角C=_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13bdec75fbee7f3f88122d98375d6ee1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13bdec75fbee7f3f88122d98375d6ee1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13bdec75fbee7f3f88122d98375d6ee1.png)
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解题方法
2 . 顶点在单位圆上的
中,角
所对的边分别为
.若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42acd3ee01d9f843a8579ffb0b7d9d82.png)
____ .
![](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/d32e7ffe58b6da39c8e1ad036bfa99b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf0b9b24c44f56961262b7ed05b5f0cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42acd3ee01d9f843a8579ffb0b7d9d82.png)
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解题方法
3 . 已知数列
中,
,则
的值为__________ .
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573169345814528/1573169351925760/STEM/3a23feafa2e3442bb2208b0ce003118f.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573169345814528/1573169351925760/STEM/d17392b315f74f27a973aeca231ebf0d.png?resizew=180)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573169345814528/1573169351925760/STEM/4248ebd3891b430182c9b4bc00bc03d5.png?resizew=24)
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4 . 在相距
千米的
两出测量目标
,若![](https://img.xkw.com/dksih/QBM/2016/11/23/1573169345814528/1573169351901184/STEM/2ca734ed6e944c42b49eb3a65fa5972a.png?resizew=92)
,求
之间的距离是_____ 千米.
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573169345814528/1573169351901184/STEM/798cf9a5753e4d1da4951fa4f9b00bdd.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573169345814528/1573169351901184/STEM/f2c058eeb415476e860bd4a5a3cecf1d.png?resizew=32)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573169345814528/1573169351901184/STEM/402f454429b24d3eb255897d2be2d0e9.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573169345814528/1573169351901184/STEM/2ca734ed6e944c42b49eb3a65fa5972a.png?resizew=92)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573169345814528/1573169351901184/STEM/495c7713aaa447c696174715e7a6ab3b.png?resizew=85)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573169345814528/1573169351901184/STEM/5df03d63c2fb407588f16ed0abcb84cc.png?resizew=33)
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5 . 设数列
的前
项和为
, 若
,
N
, 则数列
的前
项和为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0bbb67593c95bab93ff67145ae95ea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52223b89a6d01df1de9d329a8145acea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c81a57cae6fe8a6542f2b56ff5e0c9b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8050391385b496e9c059201e4f12600a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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6 . 在等比数列
中,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2803cba8d834dd8af69ef19e6954fd87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
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7 . 已知在
中,角
所对的边分别为
.若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
___ .
![](https://img.xkw.com/dksih/QBM/2016/10/8/1573057419362304/1573057425563648/STEM/5d3400152c2f42c1b446c560fd672235.png?resizew=43)
![](https://img.xkw.com/dksih/QBM/2016/10/8/1573057419362304/1573057425563648/STEM/1be612bdab7d47018664a7bfcf7483e7.png?resizew=49)
![](https://img.xkw.com/dksih/QBM/2016/10/8/1573057419362304/1573057425563648/STEM/b678dee7a75e459c9f845b08b2df1477.png?resizew=37)
![](https://img.xkw.com/dksih/QBM/2016/10/8/1573057419362304/1573057425563648/STEM/a46616af717b47ca839edfd941df5bab.png?resizew=78)
![](https://img.xkw.com/dksih/QBM/2016/10/8/1573057419362304/1573057425563648/STEM/ce5bcb3895cd4041a48f0d9ff1f82c05.png?resizew=84)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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名校
8 . 若不等式组
所表示的平面区域存在点
,使
成立,则实数
的取值范围是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68eca3bef0ac82c6c18982c8030fbaf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb6a4781b020b879519321e05c299f6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b528557effd95e0c7debf9a635f849ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2016-12-04更新
|
525次组卷
|
4卷引用:2017届广东省仲元中学高三9月月考数学(理)试卷
名校
9 . 已知等比数列
的第5项是二项式
展开式中的常数项,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/720b2ab52a64e5229f4a66f9a94b2b3e.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95b3c3ef2e1fae0ddd7dd17d24710269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/720b2ab52a64e5229f4a66f9a94b2b3e.png)
您最近一年使用:0次
2016-12-04更新
|
415次组卷
|
6卷引用:2017届广东省仲元中学高三9月月考数学(理)试卷
10 . 如果实数
满足:
,则目标函数
的最大值为________ .
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022152835072/1573022158970880/STEM/ca9e628a09284aa58ae1109ebcf872c5.png?resizew=28)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022152835072/1573022158970880/STEM/fa7ee43c4ca64b2db2ba4d742bffeffc.png?resizew=93)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573022152835072/1573022158970880/STEM/cb54735dc1064bc09eceab108d60833b.png?resizew=70)
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