x (y+1/x)=2013,x与y都是正整数,那么x+y的最大值与最小值分别是多少?急啊!
人气：320 ℃ 时间：2020-09-25 16:48:35
解答
即xy+1=2013
xy=2012=1×2012=2×1006=4×503
所以x+y最大=1+2012=2013
最小=4+503=507
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