1.已经a>b>c,用分析法证明1/a-b + 1/b-c + 1/c-a >02.已经a>0,b>0 ,求证:1/a +1/b +1/c ≥2(1/a+b + 1/b+c + 1/c+a)3.正方形ABCD在直角坐标系内,已知其中一条边AB在直线y=x+4上,CD在抛物y^2=x上,求正方形ABC
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![1.已经a>b>c,用分析法证明1/a-b + 1/b-c + 1/c-a >02.已经a>0,b>0 ,求证:1/a +1/b +1/c ≥2(1/a+b + 1/b+c + 1/c+a)3.正方形ABCD在直角坐标系内,已知其中一条边AB在直线y=x+4上,CD在抛物y^2=x上,求正方形ABC](/uploads/image/z/2084876-44-6.jpg?t=1.%E5%B7%B2%E7%BB%8Fa%EF%BC%9Eb%EF%BC%9Ec%2C%E7%94%A8%E5%88%86%E6%9E%90%E6%B3%95%E8%AF%81%E6%98%8E1%2Fa-b+%2B+1%2Fb-c+%2B+1%2Fc-a+%EF%BC%9E02.%E5%B7%B2%E7%BB%8Fa%EF%BC%9E0%2Cb%EF%BC%9E0+%2C%E6%B1%82%E8%AF%81%EF%BC%9A1%2Fa+%2B1%2Fb+%2B1%2Fc+%E2%89%A52%EF%BC%881%2Fa%2Bb+%2B+1%2Fb%2Bc+%2B+1%2Fc%2Ba%EF%BC%893.%E6%AD%A3%E6%96%B9%E5%BD%A2ABCD%E5%9C%A8%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%E5%86%85%2C%E5%B7%B2%E7%9F%A5%E5%85%B6%E4%B8%AD%E4%B8%80%E6%9D%A1%E8%BE%B9AB%E5%9C%A8%E7%9B%B4%E7%BA%BFy%3Dx%2B4%E4%B8%8A%2CCD%E5%9C%A8%E6%8A%9B%E7%89%A9y%5E2%3Dx%E4%B8%8A%2C%E6%B1%82%E6%AD%A3%E6%96%B9%E5%BD%A2ABC)
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