搵規律,如下
100,-97,94,-91...
搵佢地o既 n term
第13個term
第16個term
HELP me plz
2010-10-16 12:28 am
回答 (2)
2010-10-16 12:43 am
✔ 最佳答案
T(1) = 100 = (100 - 3*0) (- 1)^0T(2) = - 97 = (100 - 3*1) (- 1)^1T(3) = 94 = (100 - 3*2) (- 1)^2T(4) = - 91 = (100 - 3*3) (- 1)^3所以T(n) = (100 - 3(n - 1)) ( - 1)^(n-1)= (103 - 3n) (- 1)^(n-1)
利用上式 :
T(13) = (103 - 3*13) (- 1)^(13-1) = 64
T(16) = (103 - 3*16) (- 1)^(16-1)= - 55
2010-10-18 2:23 am
T(1) = 100 = (100 - 3*0) (- 1)^0
T(2) = - 97 = (100 - 3*1) (- 1)^1
T(3) = 94 = (100 - 3*2) (- 1)^2
T(4) = - 91 = (100 - 3
2010-10-17 18:24:07 補充：
T(13) = (103 - 3*13) (- 1)^(13-1)
= 64
T(16) = (103 - 3*16) (- 1)^(16-1)
= - 55
2010-10-17 18:25:48 補充：
correct
T(2) = - 97 = (100 - 3*1) (- 1)^1
T(3) = 94 = (100 - 3*2) (- 1)^2
T(4) = - 91 = (100 - 3
2010-10-17 18:24:07 補充：
T(13) = (103 - 3*13) (- 1)^(13-1)
= 64
T(16) = (103 - 3*16) (- 1)^(16-1)
= - 55
2010-10-17 18:25:48 補充：
correct
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收錄日期: 2021-04-21 22:16:57
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20101015000051KK00753