[求助]PREP两道数学题的中文翻译！

ctscts1985 · 发表于 2010-1-23 13:52:19

37. "For every integer k from 1 to 10, inclusive, the kth term of a certain sequence is given by . If T is the sum of the first 10 terms in the sequence, then T is"

请问这个题的中文意思是什么呀？尤其是这句“the kth term of a certain sequence ".

19. "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 ?"

请问这个题的中文是什么意思呀？尤其是"the number of variations in sign is defined as the number of pairs of consecutive terms of the sequence".

诚心求助！谢谢XDJM了！

上官 · 发表于 2010-1-23 18:03:45

19题的答案是什么啊？

我认为37题的 the kth term of a certain sequence 是说在一个集合里的第K个子集被给出

这个是PREP破解版里面的数学？

lmiltamy · 发表于 2010-1-23 22:19:14

. "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 ?"

我的理解,就是上面這排數字二個相乘要等於"nagative"
ex: 1,-3= -3 -3X2=-6 2X5=10(postive integer) 5X-4=-20 -4X-6=24(postive interger)

答案: 3個

[求助]PREP两道数学题的中文翻译！

回19

所属分类: GMAT考试

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