求大神解答prep数学题！

AmandaChen94 · 发表于 2016-10-17 09:57:31

1、for every positive even integer n,the function h(n)is defined to 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
2、If n is a positive integer and r is the remainder when 4+7n is divided by 3,what is the value of r?
(1)n+1 is divisible by 3.
(2)n>20
数学渣渣先谢谢啦！

烂桃儿 · 发表于 2016-10-17 11:28:09

第一题论坛里有过讨论，你搜看看。
第二题我选的A，没有特别好的办法，就是试出来的。。。

AmandaChen94 · 发表于 2016-10-17 11:39:03

烂桃儿发表于 2016-10-17 11:28
第一题论坛里有过讨论，你搜看看。
第二题我选的A，没有特别好的办法，就是试出来的。。。 ...

搜到啦，谢啦

求大神解答prep数学题！

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