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[几何] 2013年新课标全国卷Ⅱ的第12题

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realnumber posted 2014-3-26 10:13 |Read mode

已知点A(-1,0),B(1,0),C(0,1),直线y=ax+b(a>0),将ΔABC分割为面积相等的两部分,则b的取值范围是______．
原题是选择题．令斜率a变化的话，可以猜到选项.

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isee posted 2014-3-26 10:27

forum.php?mod=viewthread&tid=19

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isee posted 2014-3-26 11:05

bbs.pep.com.cn/forum.php?mod=viewthread&tid=499574

过任一点作三角形的等积线

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kuing posted 2014-3-26 12:38

回复 3# isee

bbs.pep.com.cn/forum.php?mod=viewthread&tid=501117

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其妙 posted 2014-3-26 13:43

链接当，

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