三道数学不等式题实数x,y满足x/y=x-y,则x的取值范围是?已知a^2+b^2+c^2=1,求证ab=bc=ca≥-1/2已知x>0,y>0,x不等于y,若a,x,y,b成等差数列,c,x,y,d成等比数列,比较a+b和c+d的大小请有详细过程,谢谢的确。。发
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![三道数学不等式题实数x,y满足x/y=x-y,则x的取值范围是?已知a^2+b^2+c^2=1,求证ab=bc=ca≥-1/2已知x>0,y>0,x不等于y,若a,x,y,b成等差数列,c,x,y,d成等比数列,比较a+b和c+d的大小请有详细过程,谢谢的确。。发](/uploads/image/z/8619287-23-7.jpg?t=%E4%B8%89%E9%81%93%E6%95%B0%E5%AD%A6%E4%B8%8D%E7%AD%89%E5%BC%8F%E9%A2%98%E5%AE%9E%E6%95%B0x%2Cy%E6%BB%A1%E8%B6%B3x%2Fy%3Dx-y%2C%E5%88%99x%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E6%98%AF%3F%E5%B7%B2%E7%9F%A5a%5E2%2Bb%5E2%2Bc%5E2%3D1%2C%E6%B1%82%E8%AF%81ab%3Dbc%3Dca%E2%89%A5-1%2F2%E5%B7%B2%E7%9F%A5x%3E0%2Cy%3E0%2Cx%E4%B8%8D%E7%AD%89%E4%BA%8Ey%2C%E8%8B%A5a%2Cx%2Cy%2Cb%E6%88%90%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%2Cc%2Cx%2Cy%2Cd%E6%88%90%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%2C%E6%AF%94%E8%BE%83a%2Bb%E5%92%8Cc%2Bd%E7%9A%84%E5%A4%A7%E5%B0%8F%E8%AF%B7%E6%9C%89%E8%AF%A6%E7%BB%86%E8%BF%87%E7%A8%8B%2C%E8%B0%A2%E8%B0%A2%E7%9A%84%E7%A1%AE%E3%80%82%E3%80%82%E5%8F%91)
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