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Re:我搞不清是我理解错了还是这道题目有问题。希望相关人员关注一下。

Posted by Jackburd at 2012-11-09 22:23:48 on Problem 1190
In Reply To:我搞不清是我理解错了还是这道题目有问题。希望相关人员关注一下。 Posted by:baicaitest at 2009-09-25 19:21:05

由题意知，V = π(R1^2*H1 + Ri^2*Hi + ... + Rm^2*Hm) = Nπ(当i < M时，要求Ri > Ri+1且Hi > Hi+1)
> 
> 求Q = 2π(R1*H1 +  Ri*Hi + ... + Rm*Hm）+ πR1^2 = Sπ使得S最小即2(R1*H1 +  Ri*Hi + ... + Rm*Hm）+ R1^2最小.
> 
> 那么根据数学公式求一下，当N = 100， M = 2时可求得（1）R1 = 4,H1 = 6; R2 = 2,H2 = 1.（2）R1 = 4,H1 = 6; R2 = 1,H2 = 4.（3）R1 = 3,H1 = 11; R2 = 1,H2 = 1
> 则 最小的S = 2*(4*6 + 2*1) + 4*4 = 68，即第一组.(都是程序求出来的)

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