四边形周长最短在坐标系中,矩形OACB的顶点O的原点,顶点A,B分别在x轴,y轴的真半轴上,OA=3,OB=4,D是OB的中点若E.F是边OA上的两个动点,且EF=2,当四边形CDEF周长最短时,求E.F坐标.(图略,
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![四边形周长最短在坐标系中,矩形OACB的顶点O的原点,顶点A,B分别在x轴,y轴的真半轴上,OA=3,OB=4,D是OB的中点若E.F是边OA上的两个动点,且EF=2,当四边形CDEF周长最短时,求E.F坐标.(图略,](/uploads/image/z/8274707-35-7.jpg?t=%E5%9B%9B%E8%BE%B9%E5%BD%A2%E5%91%A8%E9%95%BF%E6%9C%80%E7%9F%AD%E5%9C%A8%E5%9D%90%E6%A0%87%E7%B3%BB%E4%B8%AD%2C%E7%9F%A9%E5%BD%A2OACB%E7%9A%84%E9%A1%B6%E7%82%B9O%E7%9A%84%E5%8E%9F%E7%82%B9%2C%E9%A1%B6%E7%82%B9A%2CB%E5%88%86%E5%88%AB%E5%9C%A8x%E8%BD%B4%2Cy%E8%BD%B4%E7%9A%84%E7%9C%9F%E5%8D%8A%E8%BD%B4%E4%B8%8A%2COA%3D3%2COB%3D4%2CD%E6%98%AFOB%E7%9A%84%E4%B8%AD%E7%82%B9%E8%8B%A5E.F%E6%98%AF%E8%BE%B9OA%E4%B8%8A%E7%9A%84%E4%B8%A4%E4%B8%AA%E5%8A%A8%E7%82%B9%2C%E4%B8%94EF%3D2%2C%E5%BD%93%E5%9B%9B%E8%BE%B9%E5%BD%A2CDEF%E5%91%A8%E9%95%BF%E6%9C%80%E7%9F%AD%E6%97%B6%2C%E6%B1%82E.F%E5%9D%90%E6%A0%87.%EF%BC%88%E5%9B%BE%E7%95%A5%2C)
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