怎样计算杨辉三角每行的数字和
比如：第10 行.那么我要怎样快捷找到地10行的数.并计算10行个数和结果
人气：160 ℃ 时间：2020-04-08 09:41:30
解答
用组合数公式.
第10 行第i个=C（10,I）=10!/i!*(10-i)!
i!=1*2*3*4*5*6*7…i
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