作者chenemily (天天保持好心情)
看板GMAT
標題pp1-ps-7&165
時間Tue Oct 6 13:02:23 2009
7.
For every positive even integer n, the function h(n) is defined to be the
product of all the even integers from 2 to n, inclusive. If p is the
smallest prime factor of h(100) + 1, then p is
(A) between 2 and 10
(B) between 10 and 20
(C) between 20 and 30
(D) between 30 and 40
(E) greater than 40
答案e 請問這題該怎麼算??
我只會算到h(100)+1=2^50*50!+1 然後....就不知道了
165.
If x > y^2 > z^4 , which of the following statements could be true?
(I) x > y > z
(II) z > y > x
(III) x > z > y
為什麼I II III 皆符合???
謝謝
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1F：推 stephanini:哇你不會的剛好都跟我一樣~ 10/06 13:07
2F：推 scuhans:165說的是could be true 只要找到一個解就可以選 10/06 13:22
3F：→ scuhans:I 應該很好想 II X=0.01 Y=0.02 Z=0.05可以符合 10/06 13:23
4F：→ scuhans:III X=1 Y= -0.1 Z=-0.05可以 10/06 13:24
5F：推 scuhans:另一題的話 3055~3057有討論串 10/06 13:32