設a, b, c, d為x^4+2x^3+x+1=0之四根,
設A=a^3+2a^2, B=b^3+2b^2, C= c^3+2c^2, D=d^3+2d^2,
試求(A+B+C)(A+B+D)(A+C+D)(B+C+D)=?
收錄日期: 2021-05-04 00:44:45
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090220000016KK01385