1.a+b<0,化简|a+b-1-|3-a-b|.2.若|x+y|+|y-3|=0,求2x+y的值.3.已知a是最小的正整数,b、c是有理数,并且有|2+b|+(3a+2c)²=0.求式子4ab+c/-a²+c²+4的值.这是老师要我们去找的试题,老师说要有答案的交
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![1.a+b<0,化简|a+b-1-|3-a-b|.2.若|x+y|+|y-3|=0,求2x+y的值.3.已知a是最小的正整数,b、c是有理数,并且有|2+b|+(3a+2c)²=0.求式子4ab+c/-a²+c²+4的值.这是老师要我们去找的试题,老师说要有答案的交](/uploads/image/z/13393054-46-4.jpg?t=1.a%2Bb%EF%BC%9C0%2C%E5%8C%96%E7%AE%80%7Ca%2Bb-1-%7C3-a-b%7C.2.%E8%8B%A5%7Cx%2By%7C%2B%7Cy-3%7C%3D0%2C%E6%B1%822x%2By%E7%9A%84%E5%80%BC.3.%E5%B7%B2%E7%9F%A5a%E6%98%AF%E6%9C%80%E5%B0%8F%E7%9A%84%E6%AD%A3%E6%95%B4%E6%95%B0%2Cb%E3%80%81c%E6%98%AF%E6%9C%89%E7%90%86%E6%95%B0%2C%E5%B9%B6%E4%B8%94%E6%9C%89%7C2%2Bb%7C%2B%283a%2B2c%29%26sup2%3B%3D0.%E6%B1%82%E5%BC%8F%E5%AD%904ab%2Bc%2F-a%26sup2%3B%2Bc%26sup2%3B%2B4%E7%9A%84%E5%80%BC.%E8%BF%99%E6%98%AF%E8%80%81%E5%B8%88%E8%A6%81%E6%88%91%E4%BB%AC%E5%8E%BB%E6%89%BE%E7%9A%84%E8%AF%95%E9%A2%98%EF%BC%8C%E8%80%81%E5%B8%88%E8%AF%B4%E8%A6%81%E6%9C%89%E7%AD%94%E6%A1%88%E7%9A%84%E4%BA%A4)
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