91!+90!+89!
=89!(91*90+90+1)
=89!*91^2
因此最大质因数是89能分析一下吗？没学过这个看不懂这个是阶乘，很把公因式提出来，然后把后面的化简，最后从连乘中找到最大质因数89
Find the largest prime factor of 91!+90!+89!
Find the largest prime factor of 91!+90!+89!
数学人气：769 ℃时间：2019-11-17 02:50:45
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