[已解决]一道PREP数学,PREP1里的...请大家帮忙~

越影 · 发表于 2010-4-17 20:48:20

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

自认为没理解错题目...是不是就说h(n)=2*4*6*....*n, 然后n是正偶数. p是h(100)+1的最小质因子,问它的范围?
那...怎么做啊???
我郁闷了~这是第3题...完全傻了...

stucash · 发表于 2010-4-17 22:32:03

这是难题， PREP不是自适应，LZ不用担心。。

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?

题目是说，对每个正偶数来说，函数h（n）被定义为从2到n所有正偶数的积，包括2和n。如果p是h（100）+1的最小质因子，请问p为多少。

越影 · 发表于 2010-4-17 22:36:05

这是难题， PREP不是自适应，LZ不用担心。。

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?

题目是说，对每个正偶数来说，函数h（n）被定义为从2到n所有正偶数的积，包括2和n。如果p是h（100）+1的最小质因子，请问p为多少。

-- by 会员 stucash (2010/4/17 22:32:03)

恩..题目理解没有问题~
这道我已经搞明白了..谢谢~

[已解决]一道PREP数学,PREP1里的...请大家帮忙~

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