极限定义证明答案中的max和min在部分用极限定义证明题的答案中常常有用max和min表示的答案,用max或min的具体思路是什么啊?求证 x趋于a ,lim√x = √a的题中 |√x-√a |= |x-a|/(√x+√a )≤ |x-a|/√a x
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![极限定义证明答案中的max和min在部分用极限定义证明题的答案中常常有用max和min表示的答案,用max或min的具体思路是什么啊?求证 x趋于a ,lim√x = √a的题中 |√x-√a |= |x-a|/(√x+√a )≤ |x-a|/√a x](/uploads/image/z/3789280-64-0.jpg?t=%E6%9E%81%E9%99%90%E5%AE%9A%E4%B9%89%E8%AF%81%E6%98%8E%E7%AD%94%E6%A1%88%E4%B8%AD%E7%9A%84max%E5%92%8Cmin%E5%9C%A8%E9%83%A8%E5%88%86%E7%94%A8%E6%9E%81%E9%99%90%E5%AE%9A%E4%B9%89%E8%AF%81%E6%98%8E%E9%A2%98%E7%9A%84%E7%AD%94%E6%A1%88%E4%B8%AD%E5%B8%B8%E5%B8%B8%E6%9C%89%E7%94%A8max%E5%92%8Cmin%E8%A1%A8%E7%A4%BA%E7%9A%84%E7%AD%94%E6%A1%88%2C%E7%94%A8max%E6%88%96min%E7%9A%84%E5%85%B7%E4%BD%93%E6%80%9D%E8%B7%AF%E6%98%AF%E4%BB%80%E4%B9%88%E5%95%8A%3F%E6%B1%82%E8%AF%81+x%E8%B6%8B%E4%BA%8Ea+%2Clim%E2%88%9Ax+%3D+%E2%88%9Aa%E7%9A%84%E9%A2%98%E4%B8%AD+%7C%E2%88%9Ax-%E2%88%9Aa+%7C%3D+%7Cx-a%7C%2F%28%E2%88%9Ax%2B%E2%88%9Aa+%29%E2%89%A4+%7Cx-a%7C%2F%E2%88%9Aa+x)
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