9-10高二下·浙江宁波·期末
1 . (请考生在下面甲、乙两题中任选一题做答,如果多做,则按所做的甲题计分)
甲题:
(1)若关于
的不等式
的解集不是空集,求实数
的取值范围;
(2)已知实数
,满足
,求
最小值.
乙题:
已知曲线C的极坐标方程是
=4cos
.以极点为平面直角坐标系的原点,极轴为
轴的正半轴,建立平面直角坐标系,直线
的参数方程是
(
是参数).
(1)将曲线C的极坐标方程化成直角坐标方程并把直线
的参数方程转化为普通方程;
(2)若过定点
的直线
与曲线C相交于A、B两点,且
,试求实数
的值.
甲题:
(1)若关于
![](https://img.xkw.com/dksih/QBM/2010/7/5/1569780724678656/1569780730241024/STEM/4bf95f2fc7714ef98ccf2b4fc5018e39.png)
![](https://img.xkw.com/dksih/QBM/2010/7/5/1569780724678656/1569780730241024/STEM/c3aece52eab5451d862423eb0927a1d4.png)
![](https://img.xkw.com/dksih/QBM/2010/7/5/1569780724678656/1569780730241024/STEM/fd8f69027a8a44c9aa67cf6e382fbce8.png)
(2)已知实数
![](https://img.xkw.com/dksih/QBM/2010/7/5/1569780724678656/1569780730241024/STEM/9141b6d4805949de811c65f7f84e29ab.png)
![](https://img.xkw.com/dksih/QBM/2010/7/5/1569780724678656/1569780730241024/STEM/a440931a57094279b754b269a5d6adef.png)
![](https://img.xkw.com/dksih/QBM/2010/7/5/1569780724678656/1569780730241024/STEM/bc6527d32efd4c68b90e4fc94d5eef16.png)
乙题:
已知曲线C的极坐标方程是
![](https://img.xkw.com/dksih/QBM/2010/7/5/1569780724678656/1569780730241024/STEM/04f79be0ae5f401b80ef7e443f3a2cef.png)
![](https://img.xkw.com/dksih/QBM/2010/7/5/1569780724678656/1569780730241024/STEM/6e120a73858a4f6397abbfc20a38edb1.png)
![](https://img.xkw.com/dksih/QBM/2010/7/5/1569780724678656/1569780730241024/STEM/4bf95f2fc7714ef98ccf2b4fc5018e39.png)
![](https://img.xkw.com/dksih/QBM/2010/7/5/1569780724678656/1569780730241024/STEM/929d63804ed0476788f301dd16ebd41a.png)
![](https://img.xkw.com/dksih/QBM/2010/7/5/1569780724678656/1569780730241024/STEM/c1b6bfe6b2ca4e9590bd7ceaa5739a0c.png)
![](https://img.xkw.com/dksih/QBM/2010/7/5/1569780724678656/1569780730241024/STEM/c4496593a45f4b369121945f6ccef335.png)
(1)将曲线C的极坐标方程化成直角坐标方程并把直线
![](https://img.xkw.com/dksih/QBM/2010/7/5/1569780724678656/1569780730241024/STEM/929d63804ed0476788f301dd16ebd41a.png)
(2)若过定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38aa6f8d373b772e5d0d4bf62a654469.png)
![](https://img.xkw.com/dksih/QBM/2010/7/5/1569780724678656/1569780730241024/STEM/929d63804ed0476788f301dd16ebd41a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f10d7acd57e7ed29cccfce2eb3318e.png)
![](https://img.xkw.com/dksih/QBM/2010/7/5/1569780724678656/1569780730241024/STEM/a59e74ab61e14a64ab5924de7f47f8a8.png)
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9-10高二下·浙江杭州·期末
2 . 如果关于x的不等式
的解集为空集,则实数b的取值范围为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77506514029914e2f46cfed8583914d9.png)
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