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《科学网》把我气毁了。。。

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发表于 2016-9-6 04:17 | 显示全部楼层 |阅读模式
我在《科学网》说:
32*x^5-160*x-79=0的根就是这个样子:

x1=(实数)
(2*5^(1/2)+6-2*(8*(125^(1/2)+11)^2)^(1/5))
/(5*(8*(125^(1/2)+11)^2)^(1/5)-5*5^(1/2)-15)

x2 = (虚数)
(-sqrt((-(15*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/6))/(8*sqrt(144*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(2/3)-15*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/3)-950)))-(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/3)+475/(72*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/3))-5/24)/2)-sqrt(144*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(2/3)-15*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/3)-950)/(24*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/6))+1/8

x3=(虚数)
sqrt((-(15*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/6))/(8*sqrt(144*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(2/3)-15*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/3)-950)))-(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/3)+475/(72*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/3))-5/24)/2-sqrt(144*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(2/3)-15*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/3)-950)/(24*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/6))+1/8

x4=(实数)
(-sqrt((15*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/6))/(8*sqrt(144*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(2/3)-15*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/3)-950))-(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/3)+475/(72*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/3))-5/24)/2)+sqrt(144*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(2/3)-15*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/3)-950)/(24*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/6))+1/8

x5=(实数)
sqrt((15*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/6))/(8*sqrt(144*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(2/3)-15*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/3)-950))-(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/3)+475/(72*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/3))-5/24)/2+sqrt(144*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(2/3)-15*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/3)-950)/(24*(3575/3456+(175*sqrt(4163))/(128*3^(3/2)))^(1/6))+1/8


来了一瓣大蒜头说:
你会解方程吗(随便不动脑子给出一个公式就是方程根吗)???
就拿x1来说,你为什么说是32*x^5-160*x-79=0的根呢???
x1的分母(包括分子也是如此)(5*(8*(125^(1/2)+11)^2)^(1/5)-5*5^(1/2)-15)展开化简后明显严格=0(这你也不会计算吗?你算出的结果等于多少?),而且其中没有负数的次方计算,难道一般的加减乘除开方你都不会计算吗???难道0除0就是任何一元五次方程的根吗???


我回复如下:
X1=(2*5^(1/2)+6-2*(8*(125^(1/2)+11)^2)^(1/5))
/  (5*(8*(125^(1/2)+11)^2)^(1/5)-5*5^(1/2)-15)

分子(2*5^(1/2)+6-2*(8*(125^(1/2)+11)^2)^(1/5))化简:
=((-(62976+5632*5^(3/2))^(1/5))+2*sqrt(5)+6)
≠0(小于0,是负数)

分母(5*(8*(125^(1/2)+11)^2)^(1/5)-5*5^(1/2)-15)化简:
=(5*(1968+176*5^(3/2))^(1/5)-5^(3/2)-15)
≠0(大于0,是正数)

连个基本的化简您都搞不定,还整天咋咋呼呼滴,愁人啊!
您去《数学研发论坛》把这个:
X1=(2*5^(1/2)+6-2*(8*(125^(1/2)+11)^2)^(1/5))
/(5*(8*(125^(1/2)+11)^2)^(1/5)-5*5^(1/2)-15)
粘过去,看看他们是咋给您化简的?(不过也不好说啊,那帮人的脑子也已经被祸害的差不多了!)

反问您一句:(5*(8*(125^(1/2)+11)^2)^(1/5)-5*5^(1/2)-15)展开化简后明显严格=0么?(这你也不会计算吗?)
5*(8*(125^(1/2)+11)^2)^(1/5)  与  5*5^(1/2)+15 是相等的么?前者大于后者您知道么?
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