在正方形ABCD中,AB=6,角EDF=45°(E.F不与任和一点重合)⑴求证:AE+CF=EF⑵设AE=x,CF=y,求x与y的函数解析式和定义域⑶三角形BEF的面积能否为8,能的话,求EF的长,不能的话,说明理由
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![在正方形ABCD中,AB=6,角EDF=45°(E.F不与任和一点重合)⑴求证:AE+CF=EF⑵设AE=x,CF=y,求x与y的函数解析式和定义域⑶三角形BEF的面积能否为8,能的话,求EF的长,不能的话,说明理由](/uploads/image/z/12883416-24-6.jpg?t=%E5%9C%A8%E6%AD%A3%E6%96%B9%E5%BD%A2ABCD%E4%B8%AD%2CAB%3D6%2C%E8%A7%92EDF%3D45%C2%B0%28E.F%E4%B8%8D%E4%B8%8E%E4%BB%BB%E5%92%8C%E4%B8%80%E7%82%B9%E9%87%8D%E5%90%88%EF%BC%89%E2%91%B4%E6%B1%82%E8%AF%81%EF%BC%9AAE%2BCF%3DEF%E2%91%B5%E8%AE%BEAE%3Dx%2CCF%3Dy%2C%E6%B1%82x%E4%B8%8Ey%E7%9A%84%E5%87%BD%E6%95%B0%E8%A7%A3%E6%9E%90%E5%BC%8F%E5%92%8C%E5%AE%9A%E4%B9%89%E5%9F%9F%E2%91%B6%E4%B8%89%E8%A7%92%E5%BD%A2BEF%E7%9A%84%E9%9D%A2%E7%A7%AF%E8%83%BD%E5%90%A6%E4%B8%BA8%2C%E8%83%BD%E7%9A%84%E8%AF%9D%2C%E6%B1%82EF%E7%9A%84%E9%95%BF%2C%E4%B8%8D%E8%83%BD%E7%9A%84%E8%AF%9D%2C%E8%AF%B4%E6%98%8E%E7%90%86%E7%94%B1)
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