part a) express K1,K2 in term of a:
ANS:K1=6a+15
K2=30a+20
part b) IF 6,K1,K2 are in A.P. find a:
ANS:2over9,即2/9
part 『b』 plz, a我計到..
FORM 4 A MATHS (trinomial) part b only
2006-12-16 8:36 pm
回答 (1)
2006-12-16 8:42 pm
✔ 最佳答案
A.P.即係common difference會一樣..所以..
K2-K1=K1-6
(30a+20)-(6a+15)=(6a+15)-6
30a+20-6a-15=6a+15-6
18a=4
a=4/18
a=2/9
收錄日期: 2021-04-12 23:11:54
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061216000051KK01503