1 . 正整数数列
满足
,
满足
,
.在
中两数列的公共项的个数是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/204599d8ea20f6c9067108e219408e77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da1295a23c862d4015738ea74a68de07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4613271f782a90ab580131d09d03d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31acd0e41081a835a3a4aafb0e1bf8a4.png)
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2 . 设
,
,
,满足
,则函数
的最小值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9f5ece6d072055eb51a77e8b39eef8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcf7773acf11cd67f5c43448d661a04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/408041ad379ccb548b8589ef56837396.png)
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3 . 若三个角
、
、
成等差数列,公差为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbcec425e0dbc39b16e8c47d0ef25461.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbcec425e0dbc39b16e8c47d0ef25461.png)
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4 . 若双曲线
的两个焦点恰是椭圆
的两个顶点,而双曲线
的两个顶点恰是椭圆
的两个焦点,则双曲线
的方程为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1211bc23e6147dcde7613c0307afb7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
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5 .
、
为正整数,满足
,则所有正整数对
的个数为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4054beffb09a8e3b50672254b18f018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
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6 . 设
.则二次曲线
与
必有( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/553e4f284b7e0b22769ae18e29c4fa6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac6f9c260d05c1b6abf91f0384a0c4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ea5ff71e486af6799871a51841f1844.png)
A.不同的顶点 | B.不同的准线 |
C.相同的焦点 | D.相同的离心率 |
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7 . 已知
、
是不等于1的正数,
.若
,则下面成立的是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9463cc6ced07b6e3d1f62f1ddb46e19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c40aa670acd46e43b2caa257744821eb.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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8 . 设
.则
等于( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208cbcb7de1a8855bd57cd81db6caccb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f5463d2cc64c0469d152a947cc829d.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2006高三·江西·竞赛
9 . 若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432116baecea9694d723e50b003bcbaa.png)
____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cda45b82deff57352a5805bce66ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432116baecea9694d723e50b003bcbaa.png)
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