數學問題(求救)
回答 (3)
2007-09-06 2:39 am
✔ 最佳答案
Because of x^2+14x+k=0 , 沒有實根So That Δ < 0
(14)^2-4(1)k <0
196-4k<0
-4k<-196
4k>196
k>49//
2007-09-06 3:15 am
You can ask teacher.
2007-09-06 2:49 am
2+1??? 1to2 ???
收錄日期: 2021-04-13 13:20:05
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070905000051KK02900