反证法 几何难题1.在△ABC中,AB=AC,P是△ABC内一点,且∠APB大于∠APC,求证:PB小于PC2.在直角坐标系同,点A,B分别在射线Ox,Oy上来回移动,BE是∠ABy的平分线,BE的反向延长线与∠OAB的平分线相交于点C.
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![反证法 几何难题1.在△ABC中,AB=AC,P是△ABC内一点,且∠APB大于∠APC,求证:PB小于PC2.在直角坐标系同,点A,B分别在射线Ox,Oy上来回移动,BE是∠ABy的平分线,BE的反向延长线与∠OAB的平分线相交于点C.](/uploads/image/z/8404065-9-5.jpg?t=%E5%8F%8D%E8%AF%81%E6%B3%95+%E5%87%A0%E4%BD%95%E9%9A%BE%E9%A2%981.%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2CAB%3DAC%2CP%E6%98%AF%E2%96%B3ABC%E5%86%85%E4%B8%80%E7%82%B9%2C%E4%B8%94%E2%88%A0APB%E5%A4%A7%E4%BA%8E%E2%88%A0APC%2C%E6%B1%82%E8%AF%81%EF%BC%9APB%E5%B0%8F%E4%BA%8EPC2.%E5%9C%A8%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%E5%90%8C%2C%E7%82%B9A%2CB%E5%88%86%E5%88%AB%E5%9C%A8%E5%B0%84%E7%BA%BFOx%2COy%E4%B8%8A%E6%9D%A5%E5%9B%9E%E7%A7%BB%E5%8A%A8%2CBE%E6%98%AF%E2%88%A0ABy%E7%9A%84%E5%B9%B3%E5%88%86%E7%BA%BF%2CBE%E7%9A%84%E5%8F%8D%E5%90%91%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%B8%8E%E2%88%A0OAB%E7%9A%84%E5%B9%B3%E5%88%86%E7%BA%BF%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9C.)
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