why not discussing c=-1, 13, or -13

来源: DCH 于 2016-10-24 16:52:16 [] [旧帖] [给我悄悄话] 阅读数 : (174 bytes)
回答: c=1, c-a=-1, c-b=-13 由 小睿儿 于 2016-10-24 14:34:50

certainly one of a or b will become negative, but I think we should discuss those conditions. Or at least briefly explain why you do not consider those conditions.

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