几道高中不等式1.设ab<0 求证 :a分之b+b分之a小于等于-2 ,并指出等号成立的条件2.设ab≠0,比较|a分之b+b分之a|与2的大小3.设a、b为任意实数,比较下面各题中两式值的大小:①a²+4b²与-4ab
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![几道高中不等式1.设ab<0 求证 :a分之b+b分之a小于等于-2 ,并指出等号成立的条件2.设ab≠0,比较|a分之b+b分之a|与2的大小3.设a、b为任意实数,比较下面各题中两式值的大小:①a²+4b²与-4ab](/uploads/image/z/8732043-27-3.jpg?t=%E5%87%A0%E9%81%93%E9%AB%98%E4%B8%AD%E4%B8%8D%E7%AD%89%E5%BC%8F1.%E8%AE%BEab%EF%BC%9C0+%E6%B1%82%E8%AF%81+%EF%BC%9Aa%E5%88%86%E4%B9%8Bb%2Bb%E5%88%86%E4%B9%8Ba%E5%B0%8F%E4%BA%8E%E7%AD%89%E4%BA%8E-2+%2C%E5%B9%B6%E6%8C%87%E5%87%BA%E7%AD%89%E5%8F%B7%E6%88%90%E7%AB%8B%E7%9A%84%E6%9D%A1%E4%BB%B62.%E8%AE%BEab%E2%89%A00%2C%E6%AF%94%E8%BE%83%7Ca%E5%88%86%E4%B9%8Bb%2Bb%E5%88%86%E4%B9%8Ba%7C%E4%B8%8E2%E7%9A%84%E5%A4%A7%E5%B0%8F3.%E8%AE%BEa%E3%80%81b%E4%B8%BA%E4%BB%BB%E6%84%8F%E5%AE%9E%E6%95%B0%2C%E6%AF%94%E8%BE%83%E4%B8%8B%E9%9D%A2%E5%90%84%E9%A2%98%E4%B8%AD%E4%B8%A4%E5%BC%8F%E5%80%BC%E7%9A%84%E5%A4%A7%E5%B0%8F%EF%BC%9A%E2%91%A0a%26sup2%3B%2B4b%26sup2%3B%E4%B8%8E-4ab)
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