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简单证明~假设有a,b,c 且结果是r 则 r = 2*sqrt(2*sqrt(a*b)*c) 则 r^2/8 = sqrt(a*b*c*c); 若要 r 最小 则 c 一定是 a,b,c 中最小的 所以就是不断地取两个大数相乘喽~~ Followed by:
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