已知直线l的参数方程为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102311061966255/SYS201311031023110619662022_ST/0.png)
(t为参数),曲线C的极坐标方程是
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102311061966255/SYS201311031023110619662022_ST/1.png)
以极点为原点,极轴为x轴正方向建立直角坐标系,点M(-1,0),直线l与曲线C交于A,B两点.
(1)写出直线l的极坐标方程与曲线C的普通方程;
(2)线段MA,MB长度分别记|MA|,|MB|,求|MA|•|MB|的值.
考点分析:
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已知函数
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,在x=1处取得极值为2.
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102311061966255/SYS201311031023110619662019_ST/0.png)
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2(其中3<R<5)于A、B两点,求|AB|的最大值.
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102311061966255/SYS201311031023110619662017_ST/0.png)
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