作者alansher (我不快乐 真的)
看板GMAT
标题Re: [计量] PP-PS1 #19
时间Mon Jan 7 23:10:25 2008
这一题就是说
在1, -3, 2, 5, -4, -6这个数列里面
共有几对相邻的乘积为负
共有 (1.-3) (-3,2) (5,-4)
三组
※ 引述《MiniWater (MiniWater)》之铭言:
: For a finite sequence of nonzero numbers, the number of variations in sign is
: defined as the number of pairs of consecutive terms of the sequence for which
: the product of the two consecutive terms is negative. What is the number of
: variations in sign for the sequence 1, -3, 2, 5, -4, -6 ?
: (A) One
: (B) Two
: (C) Three
: (D) Four
: (E) Five
: 答案是(C)
: 为什麽呢
: 有点看不懂题目..Orz
: 麻烦各位高手了~谢谢
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1F:推 vivian0321:你没替正妹Z版大?A大你不是..........跟黑脸做朋友吗?! 01/08 00:41
2F:推 MiniWater:谢谢~Orz 01/11 09:17