If n and p are integers, is p > 0 ?
(1) n + 1 > 0
(2) np > 0
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
integerwcnm
哈哈哈哈 我也
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忽视了n为整数这个条件!!!
漏看整数条件!
N P是整数,P>0么?即问P是正整数么?
(1)n+1>0 n>-1 只有n没有跟P相关的;不充分。
(2)Np>0 只能说明np同号,有可能都为负整数;不充分。
联立:n>-1 n=0 n=1
NP>0 n又必须满足大于-1的正整数,所以n最小值也就是1,p>0
充分
If n and p are integers, is p > 0?
(1) n + 1 > 0
(2) np > 0
(1) n+1>0 且 n 是整數,則 n = 0,1,2,3,4,......... ->not sufficient
(2) np>0, n&p>0 or n&p not sufficient
(1)(2) n&p>0 -> sufficient
记个笔记:这个题漏看了整数这个条件。
所以条件1是n>-1 n大于等于0
再根据条件二同号,n不等于0
得出p大于0
读题之重要性!!
integer.........md
integers
integer
n and p are integers
Given that n is an integer, n should be positive as n>-1 and np>0.
n是整数啊整数啊!看清楚题目!
看清是整数
integer。。。害
n是整数!!!根据1),n一定是正数
INTEGER!!!!
integer!
n和p都是整数!
不知道怎么错的了。0也是整数。