如果a-3>-5,则a__________ ;如果-
<0,那么a_________ .
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更新时间:2018-02-23 10:03:40
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【推荐1】对于一个四位自然数M,如果M满足各个数位上的数字互不相同且均不为0,且它的千位数字与十位数字之差等于百位数字与个位数字之差,那么称这个数M为“等差数”.将M的千位数字与十位数字对调,百位数字与个位数字对调得到一个新的四为自然数
,并规定
.若S,T都是“等差数”,其中
,
(
,
,
,
,
且a,b,c,x,y都是整数),则
=______ (用含c,y的代数式表示),若
是一个完全平方数,则此时
最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d9337da6a80f1601ff78d339bc8e41f.png)
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