9x^2 - (k+1) x+1 = 0
k = ??
急問, 數學重根
2009-12-24 3:24 am
回答 (2)
2009-12-24 3:25 am
✔ 最佳答案
Determinant=0(k+1)^2-4*9=0
(k+1)^2=36
k+1=6 or k+1=-6
k=5 or k=-7
2009-12-24 4:21 am
更正筆誤：
Determinant → discriminant
Determinant → discriminant
收錄日期: 2021-04-26 14:03:00
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091223000051KK01490