p(x)=x^3+3x^2+4x+1
given p(x)=0 has roots a,b,c
find a polynomial with zeros a^3, b^3, c^3
you can use any method
the one with the most "beautiful" method can win
may not be the fastest
polynomial
2010-03-21 8:56 am
回答 (2)
2010-03-21 6:51 pm
✔ 最佳答案
http://www.dumpt.com/img/viewer.php?file=sr065nm1cc3xypg7hjjq.bmp係果個網度, 少少解釋 , 因為新方程既roots 係舊方程既三次方 ,
所以我一開始let y = x^3
2010-03-22 9:08 am
Let y=x³ => x=y^(1/3)
Put x=y^(1/3) into p(x)=0
Put x=y^(1/3) into p(x)=0
收錄日期: 2021-04-22 00:47:37
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100321000051KK00090