十分钟内答出再加20分!已知a,b,c是三角形ABC的三边a^2+b^2+c^2-ab-bc-ac=0(a两次+b两次+c两次-ab-bc-ac等于0)判断三角形ABC的形状,并说明理由.说明理由最重要!这是第二道:a为何值时,分时方程3a+1 —
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/27 08:31:43
![十分钟内答出再加20分!已知a,b,c是三角形ABC的三边a^2+b^2+c^2-ab-bc-ac=0(a两次+b两次+c两次-ab-bc-ac等于0)判断三角形ABC的形状,并说明理由.说明理由最重要!这是第二道:a为何值时,分时方程3a+1 —](/uploads/image/z/326641-49-1.jpg?t=%E5%8D%81%E5%88%86%E9%92%9F%E5%86%85%E7%AD%94%E5%87%BA%E5%86%8D%E5%8A%A020%E5%88%86%21%E5%B7%B2%E7%9F%A5a%2Cb%2Cc%E6%98%AF%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E4%B8%89%E8%BE%B9a%5E2%2Bb%5E2%2Bc%5E2-ab-bc-ac%3D0%28a%E4%B8%A4%E6%AC%A1%2Bb%E4%B8%A4%E6%AC%A1%2Bc%E4%B8%A4%E6%AC%A1-ab-bc-ac%E7%AD%89%E4%BA%8E0%29%E5%88%A4%E6%96%AD%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E5%BD%A2%E7%8A%B6%2C%E5%B9%B6%E8%AF%B4%E6%98%8E%E7%90%86%E7%94%B1.%E8%AF%B4%E6%98%8E%E7%90%86%E7%94%B1%E6%9C%80%E9%87%8D%E8%A6%81%21%E8%BF%99%E6%98%AF%E7%AC%AC%E4%BA%8C%E9%81%93%EF%BC%9Aa%E4%B8%BA%E4%BD%95%E5%80%BC%E6%97%B6%EF%BC%8C%E5%88%86%E6%97%B6%E6%96%B9%E7%A8%8B3a%2B1+%E2%80%94)
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