Consider the equation (k+2)x^2 - (2k+1)x + (k-3) = 0 ......(*)
(a) Find the discriminant of (*) in terms of k.
(b) Find the range of values of k if (*) has
(i)two unequal real roots
(ii)two equal real roots
(iii)no real root
以下是答案 不會列式 求過程
(a)8k+25
(b) (i) k>-25/8 (ii) k=-25/8 (iii) k<-25/8
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http://hk.myblog.yahoo.com/number20008/article?new=1&mid=39
[中四數]Functions and Graph[20分]
2008-10-15 3:34 am
回答 (1)
2008-10-15 3:52 am
收錄日期: 2021-04-23 14:06:02
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20081014000051KK01543