题库搜索>数据充分DS-15012
If a, b, and c are positive integers, with a< b< c ，are a,b with c consecutive?
(1)1a −1b =1c
(2)a+ c= b2 -1
分析A选项
分析B选项
分析C选项
分析D选项
分析E选项
我有更好的解析 
暂无雷哥网文字解析
条件1：如果a,b,c是连续正整数，可以假设a=n-1,b=n,c=n+1，
那么1/(n-1)-1/n=1/(n+1)解得n不是整数，说明连续正整数不可能满足，所以否定题干，充分
条件2：同样假设a=n-1,b=n,c=n+1，那么n-1+n+1=n^2-1,解得n不是整数，同理是充分的
猜猜酱
气死我了啊啊啊啊两个都不是连续的，所以两个都可以做出否定的判断！！所以选D呜呜呜呜呜呜呜呜GMAC你好狠啊
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2022-12-30 23:53:13
WZGL
笑死，还在想这个题好难，都不能证明出来，选了E，结果哈哈哈哈哈，好吧证否也可
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2022-12-06 11:42:53
680461elv
选错了。。。条件1可以证否所以也充分
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2022-08-15 11:12:05
JT 的未婚夫
题目能不能打全???
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2022-02-04 20:40:03
曹雨涵回复JT 的未婚夫
真的是服了，问题根本没打全
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2022-07-11 22:54:02
YEKI
都！是！否！定！
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2021-10-01 17:48:53
Litchichi
题目应该是：If a, b, and c are positive integers, with a< b< c, a, are a,b with c consecutive?
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2020-12-16 20:45:01
Tomson
不是很明白。。。。如果否定题干有用的话，E选项是干嘛的。。。。？
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2019-02-07 23:12:56
373548zna回复Tomson
因为NO也是一种回答
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2021-08-13 15:35:51
Holmes
什么鬼题目有问题吧 应该是 If a, b, and c are positive integers, with a< b< c ，are a,b with c consecutive?
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2018-03-06 21:08:56
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数据充分DS
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