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公式来了

Posted by 407811696 at 2010-08-10 21:58:27 on Problem 1423
由斯特林[striling]公式可得: 
lnN!=NlnN-N+0.5ln(2N*pi) 

而10的7次方阶乘的位数等于: 
log10(N!)取整后加1 
log10(N!)=

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