1. h(n) is the product of the even numbers from 2 to n, inclusive, and p is the least prime factor of h(100)+1. What is the range of p?
Answer: h(100)=2*4*6*...*100, h(100) is the multiple of 2, 3, 5, 7, 11, ?3. If a integer m is multiple of integer n(none 1), m+1 is not the multiple of n definitely. So, p is greater than 47. Answer is p>40 请大家多多指教~~
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发表于 2010-8-9 11:27:18
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